Refund for the returned bedding.

I bought a bedding at Home choice, They delivered the wrong size and I send it back and they brought the correct size after i notified them of the mistake they made.the amount for both bedding were charged on my account, I called them to lay a complaint and they told me to send them proof of the receipt from the post office. I did all that they have asked but to this day i am harassed by the employees everyday asking when am i going to pay but my request has not been attended to since April 2014.I have called them numerous times resend all those receipt asked them to send me a copy of ll the payments i have made but nothing has been done up to this day. I am very dissappointed with the poor service i received from Home choice.