ABSA Antivirus Centre - Wrong Serial number.

I've successfully registered for the TREND MICRO Maximum Security 2019 this morning and received a new allocated serial number. Downloaded and installed the new software went through all but upon activation was told the serial number do not exist. The trend micro support center checked and said the following and I quote - "Samantha Dhabie Ann Halog: I see, because upon checking here the serial number is disabled so I suggest that you contact your bank to ask for a new serial number". ABSA SUPPORT after 3 separate calls could not help me at all and gave me two complete wrong numbers for so-called support! After using the free antivirus software from ABSA for many years with no problems I want to know is it another service down the drain???