Bad Service Refund

I have settled my puck n pay smartshopper credit card on the 6th of February and i paid them extra R1 886.68 i haave been calling wasting my airtime on them to regund me i have written numerous emails i was asked to send documents which i did and got am email saying thry havr sent my refund request to finance every time i write them an email i get that response i am now sick and tired of begging fot my money i was also told the refunds are done on Tuesday's i dont know how many Tuesday's have passed today again i wrote am email telling them if they dont pay me today i am escalating this matter someone by name of papama send me an email requesting proof of payments for 2 amounts the other one whuch i paid in January i dont understand because the statement from them does show i have a credit of R1 886.68