Mweb Pathetic Customer Service

I've signed up with Mweb fibre (20Mb line) in July 2017 (24 month contract @ R700/month), using Vumatel. All was good I informed the Mweb sales consultant, Sammy Keele that i will be relocating to Centurion in March 2018, where an Openserve fibre line has already been installed by previous tenant. Mweb consultant assured me that he would arrange everything and assure me that everything would be seamless. After a week of calling mweb daily i finally got reconnected in the new property. But i was told that my monthly installment would increase to R899, from R799 i signed 7 months ago. My biggest problem is that i've not once gotten my 20Mb/sec line download speed (which 'm paying for), since being reconnected. It hovers around 9Mb/sec. I've contacted Mweb regarding this, sent Sammy Keele an email with my concerns, but no one from Mweb has taken the courtesy in addressing these issues. Or even called or rep**** to my correspondence.