Humiliated By Truworths

On Saturday 16 December 2023 I had a very humiliating experience in a full and busy Truworths store in Tygervalley centre. I went to make a purchase for myself , and also got a few items for the grand kids while I was there. I proceeded to the till point, which was quite busy. On my turned, I put my items on the counter and handed my card to the sales assistant. It is then that the sales assistant informed me that I could not make these purchases as I did not have any credit. I was surprised by this and asked the lady to make sure, as I was very sure that I had about R4000-00 credit available. She printed a slip and showed me that I was, infact, about R100 over the limit. Even while the sales assistant tried to be as discreet as she could this moment was very humiliating because the store was very busy. People, the tillpoint were standing quite close to one another and could see what was happening. After all , I had quite a few items in my arms, then there was a lengthy discussion and I left the tillpoint without anything. The main point that led to this happening in that just a week before, I made a purchase of R2000-00 and the tillslip still indicated that I could purchase for R4000-00 +. And I did not miss any payments. And just this past Wednesday I received an sms confirming that I still have credit available. So, my big question is, where did this all turn about within the space of seven days? I was not informed in any way, by no one, of these changes. I am disgusted and seriously humiliated by the way that I was treated by Truworths. While I am still taking this matter under advice and considering what steps to take next. I need an explanation. I need answers from Truworths. D Jonathan