I want my money

On the 24 May 2015 I went into the Gugulethu Branch to buy two television sets. We finalised the transactions and i paid with my debit card for the goods which i was meant to collect from their warehouse the following day. Upon arriving home i realised we made a mistake as we did not shop around for better deals. So i called in to cancel the deal. They asked for a copy of id which i provided and then they asked for a receipt which i no longer had. Up to today they still have not paid my R8000 and odd. I want to know if Morkels is going to be paying interest on my money that they are keeping. I am truly disappointed in Morkels an come to think of it, I buy ALL my furniture at Morkels and they can afford to treat me like this.