Transfer of ownership

We have been trying to transfer the ownership of the current fiber internet service in the same house from my daughter in law's name to my own name who is the owner of the house since late September 2024. We have had numerous mails. whatsup messages and calls with various representatives. On 19 December I received a mail that the contract has been transferred. On 1 January 2025 the services were cancelled with no internet services. For the past 3 days we were again on the phone followed by emails. The agents NEVER call back as promised. We were informed that the original service was now cancelled by the reactivation on my name still have to be done. Every time you ask a question you are referred to someone else without getting to a solution. It is useless to try and speak to any senior person to escalate the problem as they are operating incognito. I just need the internet services for my work urgently