I had 10£ Goody bag and one week ago I run out of 4g ( no calls and SMS) so I decided to ask for a gigabag (7,50£).But they are not working at the same time. Now I can't call or send SMS and my goody bag expires at 25th of october.
please, some help? Thank you very much!
As you have discovered, you can only have one bag running at a time. The gigabag you bought has no calls or texts as it is meant for dongles and tablets.
It is much better value to buy a fresh goodybag which will last a full month, and containing enough data to last for the full month. For example, you used 1GB between 25th Sept and 11th Oct, which is about half a month. It seems reasonable to assume that you need 2GB to last a full month, which is just £12. Much cheaper than the £10 + £7.50 that you tried to buy.
You don't want to be on the verge of running out, so £15 for 4GB might be better, and would still be cheaper than the two-bag solution that would have given you half the data. That's why giffgaff try to make it possible for you to do it in a much more economical way.
As petercardiff said, you'll need to ask an agent by using the form that he suggested - you aren't likely to get any refund if you've used more than 20MB of data, but at least you would be free to buy a decent-size goodybag, which will be more economical in the future.
If it doubt, it is better to start with a large goodybag for a month and then economise the following month when you can see how much data you really need.
If you recur your goodybag, you can change the recur setting without needing to contact an agent. It is much more convenient.
Hope that helps.