8 Months Later, No Help

I requested my address to be changed in February this year which was forwarded and acknowledged by FNB Premier. Fast forward to October, my address was still not updated on my profile or recent statements. I followed up on this request with an agent on SmartChat and was reassured that the change was made with the bank but for some unknown reason not on the statements. The agent assured me that the new address would reflect on the upcoming statements. Since that the October and November statement has reflected the wrong address. I need the address changed on all statements from February 2020 onwards.