Refund dispute

I returned an item on the 26 December it was a cash payment and the cashier used my card to return the money,waited till the 3rd went to the store to ask when I should expect it and I spoke to Asma and she said it will be in after 7days,went back on the 8th day as there was no money in my account,Spoke to Sara a different store manager who said the money takes 7-10 no apologies and asked me to call them if my money is not in,I left a new statement and they looked at it said it's ok with the slips,I told her I've been waisting money coming to them for my money now they want me to call,the next day I got a call from Mpumi working under Sara saying in my statement there is no January transactions I must bring another statement,asked the Manager's number to send on watsup they refused,I asked for an email I got,send the girl said January transactions is not on the statement I got frustrated because that meant the girl can't read a clear bank statement,asked her to ask someone else to read and get back to me,she didn't.On the 16th Jan last week I went back to the store with my statement spoke to Asma who said she got an email yesterday from their bank saying they sent my money it's coming within 7day.On the 21 Mpumi called to say I won't be getting any money because the statements I've been sending are from a different card not the card I used when I returned the item,I checked the slip the last numbers are different from myne,but how? I only have one standard bank card and I asked them to check the owner to see how my refund was sent to them they said they can't it's confidential, Today Sara called to say I should give them the statement of the card I used not a different account,they are accusing of *****,I'm not getting my money,I'm reporting the matter the police and I will spread my horable experience with cotton on,I won't rest until I get my money and I will post this worst customer service all over social media