Selling a handheld under false pretenses and not doing anything about it to correct their error

Vodacom call centre called me and sold me a phone under false pretences I have been calling non-stop to correct it and not getting anywhere, as the case has been logged, and they found that the case was in my favour, Case number RCO253727

What am I supposed to do or what Can I do to get service Spoke to Lyndel - 1PGG075 he said that they would issue me with a 2 month free to the value of R690.00 for falsly selling a handset to me.

Zantla - asked me to call ***

Mandixolo - asked me to conact *** ***4

Desna gave me a reference 1PGGVC3 and said she will she will log the 2 month free which did not happen

Lea - said she will escalate it and come back to me...still waiting

They are still deducting the handset from me after it was cancelled

Who else can I speak to to get this corrected?