Bad service

I canceled my contract with in May 2024. Service was canceled on 30 June 2024. Router returned as requested. Payments up to date. It is now six weeks later and you still have not released my line. That means I cannot move to a new ISP. Six weeks. Why? I paid every month for 2 years, canceled the required way. Returned the router. Yet all you have to do is release my fibre line so that I can get fibre with a new provider. By holding my line in the hope that I will return to you not a chance. I will not come back to an ISP that has no customer service. Release my line that is all I want from you.