Avoid MTN / OPPO / Takealot deal

My fiancé signed up for an expensive OPPO package through MTN that includes a phone / a tablet and a watch, this is supposed to come with a R3000 takealot voucher, for over 2 weeks now the staff at the MTN branch Vincent Park are saying it’s not their problem it’s either OPPO or Takealot that is their problem and they can’t help her. She feels like going into the store and throwing everything at them. No one is helping her. I’ve emailed MTN, Oppo, Takealot and nothing