topshop

i bought a dress from topshop while i was in cardiff, now I'm back home in london and want to change my dress for something else, can i go to my local topshop or do i have to go back to the one i bought it from?

i haven't got a picture but i was wondering incase anyone has seen it in topshop or bought it recently, if topshop still sell it cause i looooved it. it was beige and black with a bit of gold on it. it was £50 and it was a cross body bag and it was a bit suede. pleeeease help, i need this...