Trying to upgrade a contract

According to the press this company is battling to survive but you would not think so. I went online to try to upgrade a contract - had to leave a call me backmessage as it cannot be done online. Got a call from an unknown number - when answered I got music playing. Waited nothing - disconnected - they called back same thing. The third time they called I hung un because I saw the number was 084 which I assumed was cell c. When someone eventually answered I spoke and they cut me off. I then tries to call 084143 - they give a big story about covid-19 and their hours - you take appropriate options and get told you are called after hours? I called 084143 angain took different options and finally got an agent who validated my upgrade request and said someone would call with in 24 hours. I get another call from 084145 same music - I wait - when someone comes on I say you have just contacted me what information do you want - cut off again. I logged another call on the internet - no response - so 4 attenpts to upgrade and no one wants my call.

Fix your answereing service. Don't play music when you call - say this is cell c calling you back please hold while we connect you to an agent.

Usless service.