FED UP OF BEING LOYAL CUSTOMER

I have had my contract for over 16 years with Cell C. I have been loyal customer but right now I have had it with Network issues. Since December 2022 I have been unable to use my data because of connection issues, I have tried all options available on their network to no avail. I was advise to change the SIM card because it may be damage only to find out that nothing wrong with SIM card. The person from Technical department by name of Mpho last week did his best to assist me but the problem was not resolved. I was told they will send someone to me (my address) to try and resolve the connection/network issue last week Wednesday no ONE HAS come through. I think it is now best to cancel my contract because I am paying for the service that I am not receiving. Cell C need to resolve this ISSUE AND refund me for 4 Months I have been unable to use my data.