Incorrect billing and poor service

I am very disappointed in the service I am receiving from Cross trainer. I made a purchase on Sunday and your employee at Gateway billed me incorrectly, I contacted them on Monday and they acknowledged that they made a mistake and were going to refund me, I gave them my banking details.

Tuesday: The store assistant manager assured me that they are processing my refund, I requested POP she failed to provide it up until this day. She said the payment was going to take about 48 hours to reflect in my bank account.

Wednesday: Nothing happened

Thursday: She promised to get back to me after she has managed to get hold of banking department - she did not get back to me. She only sent me screenshots of the emails they have sent to head office.

I still haven’t received a proof of payment

It has been over 48 hours and there is no transaction from cross trainer. I am very disappointed on this and would like Cross trainer to process this payment today.