Unfair disconnection

My debit order of R105. 00 goes off on the 15th of every month, this December 2019 was no different. Money was available in my bank for the debit order as usual. But on 20th Dec 2019 at 18h04 I received a notification that my debit order was returned and I must pay the amount of R105. 00. On 22 Dec 2019, at 09h30 I then manually the amount I was told I owe, however as I got home my channels were disconnected. The dstv multichoice is run by ******. I mean how many hours are we supposed to be given as customers after the notice of returned debit order to pay.. Who pays without first verifying the authenticity of the message. I still don't know why my debit was returned, yet I am told to pay reconnection fee. Is there no some sort of Grace period in place for a returned debit. Every legit business has got that, why do the multichoice treat us our loyal customers with such arrogance and contempt? We remain paying even if the signals remain bad. All they want is make extra R50 from us. There was no message notification on the TV of any debit unpaid, and as soon as I was notified I took less than 48hrs to pay. Yet the ****** of a company have overcharged me