Phone Charging & Fuel Cap

[Stirton]

Hi folks, just bought a 2011 A7 (all i could afford!) delighted with the car other than the fuel cap, i can't get the !Removed! thing to open, it should be as easy as my previous car A5 unlock the car and push in the side of the fuel cap but it doesn't open, I have seen online that this is a common problem, anyone an idea of the actual issue and potential cost?

Finally how on earth do i charge my phone?  If i get an MMI adapter for android will this charge my phone?  I'm not bothered about transferring music etc i juat want to be able to charge my phone.

Ta