Afrihost Cant resolve No incoming mail issue on my domain

I haven't been receiving my emails for the past three days and Afrihost doesn't seem to be able to resolve it. The problem now is who do I turn to as I had so much faith in these guys. I've been using their services since 2016. I have 6 emails under 1 domain. And all of them are not able to receive emails, however, I can send emails out. I'm losing out on business and there is seeming no resolution in sight. I was told Server Admin Team is busy resolving yester 11 Jan 2022, morning. Today 12 Jan 22 still no end in sight to might issues.