Nobody knows what they are doing

We stay in Midstream and moved houses. The fiber at the one property was cancelled and a new one installed in the new house. Just to get the installers out was a mission. We now sit with a problem that nobody can understand why we don't want to continue to pay for the fibre in the old house where we no longer stay. We have called and spoken to numerous people about getting this old fibre off our account, got ref numbers but nothing is being done. The joke is that we have now received an ultimatum, pay us or we suspend you line. With lockdown we feed fibre to keep our jobs. We have been continually paying for the fibre at the new house so we are up to date with what we should be paying. Who can we speak to at Supersonic who can sort this out. Every time we ask for a managers name, they are not available.