Vodacom poor service

We had a prepaid phone. We however bought a new contract with a new phone. The old number had to be kept (prepaid to contract) On receiving the phone the number was changed and the original number not kept as requested. This was bought under the Vodacon agent attention on the 17 May 2019. This was regularly followed up as the number belongs to our sales (this fact was also bought under Vodacoms attention and the urgency of the matter explained) For the first 2 weeks the feedback was "sorry there is no feedback yet" After no feedback the manager was contact which proved to be fruitless. Again follow us was made, now the feedback is " sorry this takes long, they are busy with it' This has been a month without any real movement. We desperately need help as we get no joy from Vodacom. They even said we can phone complaints but it won't help. I can see no reason why changing a number (which was initially requested) needs a month to resolve