No support when things go wrong

My internet used to work fine, then it started to disconnect with speeds so slow that I cannot open Gmail. Their customer care is terrible just telling me to fix the problem with a list of things that do not work. I have not had internet for 10 days. Now they say I can cancel my service but still need to pay for a second month of no internet (R999 per month). So that is R1998 for internet that cannot even run a connection speed test. Horrible failure of customer service.