Absa ****s their own clients

I have always been on Absa rewards tier 3, not great but not bad either, now all of a sudden I am down to tier 1 and it's been weeks since I emailed them and they promised to let me know what is going on, but nothing.

It's insulting that Absa is treating lifelong clients like this and I am fed up with Absa, if you don't fix this I am moving banks and taking my home loan with me. Thanks for nothing!