The priority is to prevent them taking any more of your money, if you have no airtime credit, but only a goodybag, they cannot take these charges, but they will still build up and the charges will be taken next time you add airtime credit, if you simply block them they'll stiil be sent and the charges applied, but you'll have no information as to where the airtime credit is going or that the charges are building up.
You need to send STOP to the 5 digit number mentioned in the text
You need 10p credit to send the STOP message, but in the message there will be a customer services number which you can call from your goodybag minutes.
It is important that you do send the STOP text or that you get them to unsubscribe you.
You can enter the 5 digit number here http://psauthority.org.uk/about-us/number-checker to find alternative contact methods
See https://community.giffgaff.com/t5/Tips-Guides/Premium-text-charges-do-s-And-don-t-s/m-p/18597940#M14... for more advice on how you became subscribed
Once you've sent the stop text you'll get a successfully unsubscribed message.
Once you are unsubscribed it's time attempt to recover your money, contact them from the subscribed phone, using the help number found in the text, or through the email or website found from the link above.
Explain you never knowingly subscribed and would like a refund of the charges
I am getting texts from a company called OfferScanner.net they are charging me 1.50 a text with a maximum of 4.50 I have tried getting them stopped and blocking them no luck. Is there anything I can do or do I need to change my number?
Offerscanner.net is a 'Payforit' scam operated by a company called NBone Fide Mobile Ltd and using shortcode 88222.
I have looked at the signup page for this service and it seems to be in breach of the PSA code of conduct.
These companies use vulnerabilities of the 'Payforit' system to obtain consumers numbers and sign them up to bogus subscriptions. Simply closing an innocent looking popup can pass your number to these scammers.
GiffGaff appear to have a policy of not helping members affected by these scams, so you will have to take action yourself to stop the charges and obtain a refund.
Sending a STOP ALL text to 88222 should stop further charges. You can then call them on 0207 112 2342 to insist on a FULL refund. They can also be emailed at cs<at>bonefidemobile.com.
'Payforit' subscriptions are not strictly premium texts, although they are shown as such on your GiffGaff usage statement. 'Payforit' charges are applied directly to your account by a 'third party' which has acquired your phone number. GiffGaff make no check that you have consented to these charges, and refuse to allow you to bar them.
You need to be aware that GiffGaff leak your phone number to third parties when you access the internet using mobile data, and this is probably how your number was acquired in order to make these charges. The system which does this is called 'Payforit'.
Comprehensive and independent information and advice on dealing with these scams is on the payforitsucks website. This website won't blame you for being scammed and provides constructive advice about forcing the scammers to refund. Specialist and legal support is also available through the site if you encounter difficulties. Google "payforitsucks" or follow the link to the faq in my signature. The website contains detailed advice on the steps you need to take to stop further charges, obtain a refund and protect yourself from these scams in the future.
I hope you manage to resolve this matter. These scams are a disgrace to the mobile communications industry and GiffGaff should be doing more to assist affected members and to protect members from these scams.