Mweb - ********* business practice

I have Mweb Fibre and want to switch due to the poor service and low interrupted speed affecting my work yet I'm on a high package. I called Mweb several times and gave up. I have given Notice and was told i must pay for December and will not receive any service thereafter, who pays for Nothing - It seems that Mweb losing customers a due to the competition and want the consumer to pay extra.