poor customer service by a manager

I bought a pair of earrings from the V&A forever new. At the till I was not told that earrings could not be returned. Once I got home I compared it to the dress that I had bought it for and did not match. I went to the forever new in canal walk on the same day to return it and I was told that i could not return it. I asked the manager at canal walk why I was not told this by the sales lady she said she would phone V&A. She then brushed us off and attended to other things, making us wait a while. When she phoned V&A with our problem she failed to make the phone call in front of my mother and I at the till, instead she strolled around the shop and my mother had to follow her around to hear what was being said. When speaking to the V&A manager she found that social conversations and catch ups were more important than our issue. After spending a few minutes socialising she eventually brought up our issue.When my mother complained to the manager about the above mentioned behaviour we were greeted with attitudeshe became very defensive and brushed us off yet again. she even started to deny what my mother was saying, so now my mother was lying She failed to apologiz