i want my money back bad bad service

I have been awaiting for my refund since two weeks ago. I previously bought a paint at groupon and I used the wrong reference no when making a payment, I asked them instead of them refunding me can they give me the paint they told me I need to buy it back again they will refund me. they asked for my banking details of which by the time they were supposed to refund me I received an sms about the money but the money did not reflect I asked them to debit it back and give me credit under groupon which they did. I told them now there's nothing I can buy with the R285.00 let me rather get my money back instead of the credit. they are now not giving me my money back and they cancelled the credit under my . so basically ive been ****** my R285.00 I want my money by COB today. I have been calling them more than 4 times every time I speak to this consultant will tell me the consultant dealing with my query will call me back. I call back start again. ive emailed them proof but clearly no one Is willing to assist me. can I have what is mine by COB today my R285.00