Terrible, awful service

We subscribed to Supersonic's service in 2020 and did not receive any invoices from August 2020. On 18 February 2021, we received a sms stating that we must settle the outstanding amounts. As we did not receive invoices, we e-mailed them to ask for the outstanding invoices to obtain the correct amount we owed (that e-mail remains unanswered). The connection was shut off on that same day. We immediately phoned Supersonic and after 30 minutes of waiting, managed to speak to an employee. We were sent the invoices and we paid it immediately, sending the proof of payment. Since then, we have spent many, many hours on the phone trying to get reconnected. We keep being transferred between departments without anyone solving the issue. Each call and transfer takes 20 to 45 minutes. At least three people have promised to phone back but not one has. It sounds like the personnel are working from home without proper connections and/or equipment. There is no escalation process, we have asked to speak to managers on a number of occassions but that does not seem to even be an option. So we have been without an internet connection for 10 days, we have spent a small fortune on cellphone bills and there is no end to this in sight. Truly an awful experience.