A company with no heart

I cancelled my month-to-month LTE contract with them mid-March 2020. I was informed by the cancellations team that I still had to pay for April 2020 aswell despite wanting to cancel immediately, as they need a month's notice. Fine, whatever. Since then, I have received calls from them (Thara Germishuys more specifically) almost daily demanding payment. When I told them my employer has not yet paid me therefore I don't know when the next payment will be made (COVID is causing a lot of businesses to struggle to pay workers), they so compassionately charged interest on the outstanding amount. Their reception on the LTE is really poor and when you phone the call centre to find out why the reception is poor, they blame your house, the position of the router (I was told I need to find a way to suspend my router upside down somehow for best coverage) or even Netflix. I would not consider ever using their services again.