Mweb, the faceless service provider

Started new LTE/MTN contract with Mweb advertising for a free modem and 20Mbps download. Mweb charged me for the modem, and since day one, the download is very very erratic. Seldom would I get more than 10Mbps. Phoned Mweb a number of times, both accounts dept and technical but alas everytime I am switched off and cannot get these issues resolved. Went to their Head office in CT and there I was told I cannot see any person due to "Covid", but was phoned and said they will escalate my issues. Today is the 9th of January, and my system was switched off from 30 Dec 2022. It seems that I cannot get to anybody to solve these issues albeit that I also sent them emails!