Hi, I recently tried to change tariff (10DATA to 15DATA) before topping up and it seemed to confuse things. I should have waited for the confirmation, but I did try to change back once the £10 had been taken and the 7gb confirmed. However, after this the 7gb disappeared (I didn't notice at first, and used £2) and I seemed to be stuck on the 15 tariff. I spoke to customer services and they reinstated the 7Gb, but took the remaining money in the account to do so, meaning that I've paid £18 for 7Gb. In addition, the data seemed to be 1/10th of what it should be. I don't have a great data signal, or much space on my phone, so I know I've only used about 700mb (and no streaming), plus I had the 'less than 1.4gGb' warning in less than an hour (with no throttling), which I'm sure is impossible in my area.
