Very very unsatisfied

I have had a very bad experience with Mondo. On 12 June 2024 I received a call from Mondo for a contract upgrade on my MTN account. The operator was Govern. With my previous contract I received 20 Gigs op free recurring data. After asking her numerous times whether this data would be carried over to the new upgrade contract and being assured that it would (that I should just phone 083135 to have it activated) I agreed to the upgrade. Upon phoning 083135 I was informed that Govern did not know her products and that I would not get the 20 Gigs. Now I am battling to get what was promised. I spent almost the whole of 12 June on the phone being sent from pillar to post which was and is terribly frustrating. The fact that calls are supposed to be recorded doesn’t seem to make a difference. I have requested that I want to make use of the cooling period and revert back to my old contract. That Mondo cancel the upgrade because if their inability to know their products. I have a ref no from 12 June 3V723BU. I am deeply disappointed and am actually thinking of leaving MTN because of this bad experience.