Refund battle

I have received terrible service from Mrp. Three orders with issues first order I purchased clothes and something was out of stock this was the 2nd of August and till today 2 September I haven't been refunded. I made two other orders which were cancelled due no stock yet all things were in stock when I made the purchase. I called mrp to ask for a refund and they insisted on giving me vouchers for all three orders the instruction was to call back once I receive the vouchers via email and then they would process refund to my account. After getting the vouchers I called the customer centre and also sent emails with banking details used for the purchase, I then called to confirm if they got the emails and the lady I spoke to said they would need a bank letter to verify the account, I sent the bank letter to confirm the details I provided and called again to notify them to my utter surprise someone has the nerve to email me asking why the bank account is not in my name. ( This account is the account used to make all the purchases and it's a family account and my husband and I use the same surname) why wasn't this question asked the 100 times I have paid with it. Why give me the run around for our money yet you already inconvenienced us by not having products you advertised as available. This is terrible service i must say.