iphone 4 16gb black on 02 faulty : West London : £270

iphone 4 32 gb locked to 02 show no service.i got it from here a week ago for £350 and bought a bumper of it for £26 it did work fine when i was buying and now shows no service.still can be used as ipod thats what i got told when i took it to the shops to get it repaired its not making calls and texts :( .im located in hounslow west / west london contact 07852822877
. iphone 4 16gb black on 02 faulty : West London : £270