Debit refund

I canceled my contract with ONAIR before installation I didn't even open the parcel, and they asked me to pay R150 for recollection which I did, and two days later the caurier came to collect decoder on the day they were supposed to debit I withdrew all my money and the following week when I got paid they deducted the money from my Capitec account I then sent them Email to request a refund and they told me that as soon as it reflect in my account they'll do the refund,I thought that would take 24-48 hours I enquired after that and they told me it will take +-21 days for the money to reflect then refund will be processed, that I didn't believe, I think they ******** me please help me get my money back it's R199+R150 Thanks