Very poor service when you’re no longer their client after I have been with them for almost 2 years

Very poor service when you’re no longer their client after I have been with them for almost 2 years. The problem started when I notified them in time that I was moving home and would like to continue use them at my new address, they checked for fibre coverage at my new address and confirmed that it is available and then they sent me a quote to accept on the 21st of December 2024. I have been waiting since then until today when I phoned them to make a follow up, only now they tell me that there is no coverage at my new address and when I asked them why they didn’t bother to inform me all this so I can make plan b and I got no clear response. Now they’re making me to send emails to people that are out of office just to get a quote for an LTE. I am very disappointed and hurt because I thought they were a good service provider and taking good care of their clients.