Bad service

I have asked for a number change as i no longer need the old no was using on their contract. Since I have upgraded now this phone isn’t a dual sim so I don’t need their no I want my primary no and all my benefits to be loaded onto. It’s such a hustle. I made a new request after numerous have not been attended to, I made a new one on the fist of this month and this was the message I received “We have received your query and will attend to it shortly. Your reference no is: ***. An SMS will be sent to you when your query has been resolved. Cell C “ just called their call centre now and a lady Gugu told me my request is still running. This is after I bought airtime on my primary SIM card loaded a R5 airtime needed to make a quick call because I was tired of changing SIM cards, my airtime was finished before I could even make a call. When I called call centre I was told I have just sent an sms to an international no and when I said I did not the agent could not help me with even blocking this no.