Extremely Poor Customer Service from Supersonic (Unfair)

My experience with "Supersonic" Wi-Fi providers has been a disaster. When I signed up with them, they took all my personal details to debit my account every month the first few months was debited then they stopped debiting, and they failed to contact me to notify me that they are facing issues debiting customers' accounts. Fine I made it my Duty as a customer to contact them I did it via email and phone calls. After months of not getting any response from them via email and WhatsApp customer service today I have given them a call after many attempts I spoke to an agent that told me "I NEED TO PAY THE FULL OUTSTANDING AMOUNT TO GET MY LINE BACK" they couldn't even notify me that they going to cut my line. This is so unfair cause my kids use the Wi-Fi to do schoolwork watch videos and myself. I have asked the agent kindly if it's possible for I to pay half the amount so my line can be up and running again I was told not possible at all. We have debit orders on our accounts for many things if I missed payment why couldn't an agent inform me that they are having issues debiting customers' accounts. Such Poor Customer Service. Now in stuck with no Wi-fi. After I spoke to an agent today, they actually sent me a statement for a first time, but they couldn't contact me when they had an issue debiting my account.