Cell c fibre and customer service

After being a loyal customer for 4 years and having to move to a new address. As I work from home and am moving on 1 December I asked cell c to cancel my subscription on 1 December they refused to extend my service for 1 day and charge me prorate meaning that I will loose income. I think that this is terrible customer service. They have also been over charging me as they could have offered me a reduction in cost for my subscription as they have come down significantly for quite some time which they failed to offer as they dont care about you and your needs only their bottom line. They also cut my line the other day accidentally and I had to spend the whole day fighting with them to get it back on as otherwise I would have lost more income. When it comes to ISP providers one may want to look elsewhere.