Terrible Service for a full on 3months

I moved home in February, served a notice from 01 March to 31 March The service was to be cancelled on 31 March and will not be billed for the old house as of 01 April. 01 April- I was debited for the service at my old home as well as my new home, I enquired and was told that someone forgot to put in a cancellation notice on 01 March. I was due for a refund, which I was told I would get it in 5days I never received the refund, and thus on the 09th April I enquired about cancelling the service for my new home as well. I was told I would need to serve a calendar month, thus, I would need to wait to serve the notice from 01 May to 31 May

On 25th April, I was told I will not be receiving the refund, it will be app**** as credit for May, my notice period. This was never discussed with me, throughout April, I was made to believe that there are delays with the refund, I will get the refund to my bank account in a few days. I was also asked to supply my banking details for this transaction, which I did

On 01 May, I was due to put in a notice of cancellation. However I woke up to no internet, an SMS and email notifying me that the services have been terminated. They apologized for disconnecting my service prematurely. If it is possible to terminate services as an error, why is the notice period necessary.

I have been trying, unsuccessfully so to reconnect. Today alone, I have been on WhatsApp chatline from as early as 9am, 16h41 when the agent told me I must pause for 30min. Still not internet, yet I paid.