So your telling me you can't do anything then because I can't get on that page?! I'll be ringing my bank see if they can cancel it and I'll be taking this further!! Worse phone provided ever!!! Will definatley make sure everyone knows it
So you make a mistake by buying something you didn't want, then you blame giffgaff and finally you complain because you you haven't got the patience to get it sorted out?
You need to get yourself to a suitable computer and log in to your account. Then you will be able to access the page you seek. That is how provider with 'online support' works. Once you have sent the appropriate message, you never know, you might actually get a refund.
You must realise though that giffgaff does not 'take' money from a customer, it merely receives a payment from a customer who has purchased something. By clicking the 'buy' button, you have given your bank the authority to debit your account. It seems you have purchased two things and have paid accordingly.
Take a deep breath, step back and try again.
It looks like the extra £20 is for next months bundles. How do I stop that as I want to pay when I can not at once
Whatever the overpayment was for, the only way of getting a refund is to raise a support ticket. The reason you cannot access the support system at present is because your SIM has not finished activation. Give it a couple of hours then everything will have settled down and you will be able to contact the agents.