Relocation Blunder

I have really had the worst experience ever with Supersonic as you can never get a commitment from them and often you are on the call and it just goes dead or they hang up on you, I requested a "relocation" on 26 Oct and kept getting the same email that says it's still in progress, now it's the 2nd of Dec and I ask what is happening with my order as there are new people in my previous property and they cant connect to a fibre ISP as my account is still live there, only to be told oh no sir you don't have coverage at the new address (well there is), now that they have figured that out I have had to start the process again and the poor people at my old property are at their mercy (through no fault of theirs or mine). I have also asked them to release my line from my old property in the meantime and can't get an any sort of ETA, I asked can I speak to cancellations directly, but no they don't talk to customers, never in my life have I been treated this poorly by an ISP and still I don't have an answer, I need to know when my line will be released from my old property as I cant expect the people to wait for my line to go in at my new property and I need to know ASAP. The whole reason I'm in this situation is because Supersonic cant take a simple order or give accurate updates, highly frustrating!!!