Unhappy about service

I received a call from cell c promoting and upgrade same package deal for less and today i receive the router which i am very impressed as i did the upgrade 19/03/2019 and router is delivered today . I then log onto my dashboard and my data is gone and i have suddenly got voice data how annoying i call in and cell c 084145 help line cannot assist in retentions or upgrade as it was an outsource who did the upgrade and the first lady who assist me says they messed it up so i need to speak to retentions and retention says they cannot assist they have forward my contact details an the company will correct i am still awaiting a call sale done so we dont care but my service has been changed nothing i signed up for. I was advised by the consultant the special ended friday but they are still offering and i was hesitant but thought wow i will save now but it has now caused me time from my desk and the fact that the data i had is gone and was advised it will only change in June so now what. Cell C really thought wow moment but i am not impressed any longer with the assistance or service as a client.