Makro not doing their job and blocking accounts for NO REASON

On the 4th of November my Makro account was settled and I phoned them to DECREASE my credit limit.

Monday 8 November, I tried to purchase a few items on my Makro card at Checkers. At the till I was advised that they now need to phone Makro to confirm that I am indeed the card holder. After waiting 10min for them to get someone on the line, I spoke to a lady who confirmed my details. She then told me that my account has been blocked due to "No purchases". I explained to her that it cannot be because I have bought on the card recently, even though I settled the account. She then put me on hold to find out why there was a block on my card. She came back with the answer: "Mam, there is no reason why card has been blocked". At that stage I lost my patience. This was not the first time an incident like this occurred. She said that she could see someone was working on the account on the 4th of November. I explained that is the date I phoned to decrease my credit limit. She asked me if I did not request them to block my card - WHY WOULD I DO THAT???? Then I would just close the account all together. Anyway, without apologizing for the inconvenience caused, she told me she can lift the block. She lifted the block and I was able to purchase my goods.

Then I received my SMS saying thank you for purchasing on my Makro card and guess what???? They DID NOT DECREASE MY CREDIT LIMIT

I am not sure what language you need to use to communicate with the people working at Makro. Can someone please wake up and correct my account. I am NOT using MY AIRTIME to phone this company to sort out THEIR mistakes.

How can you assist me and confirm my credit limit has been decreased and then it has not been done? How can you BLOCK someone's account for no reason???