Company that doesn't respond

I ordered a pair of Women's Asics Gel Netburner 17 shoes from [URL Removed] on the 13th February.<br> On the 26th I received a pair of Men's Asics Gel Saga shoes.<br> I paid 70 GBP for The shoes I ordered and the shipping.<br> The shoes I received is 30GBP worth.<br> I messaged tem three times and I have not received any correspondence from them.<br> In my messages I asked how I can return the shoes I received and how I can get the shoes I actually ordered.<br> The real problem is that I already paid for the shoes and now they won't contact me.