False advertising by Mr price

I took up an account with Mr price after being told that I would receive vouchers upto R1000. I made all the required purchases and non of them were discounted. I went into the store and they told me call customer care and they would provide voucher codes. Called them and they keep transferring me to different departments. I was once told over the call that you would need to manually add the discounts as I already made the purchases but this was not done. Issue number 2. There was a buy 1 n get 1 free sale. I have screenshot evidence of this. Added them and completed the purchase only to see that I wasn't discounted. All of these lead to false advertising by Mr price and I'm looking to escalate this complaint if this matter is not resolved. I an also being charged interest on these incorrect charges.