Upgrade under false pretence

My contract on ********** 464, expired 31/03/2019. I upgraded online and my handset was supposed to be delivered by RAM courier to my workplace. As i am not always at the office, i requested that it be delivered when i am at the office. Guess, big RAM, would come when i am not at the office until the handset was taken back to Vodacom. I had upgraded to U choose R 160.00, as my budget for cellphone is R 200.00 . Mid May 2019, i was called by Vodacom agent, who advised that, they are calling all Vodacom users who have been overcharged and if your contract is R 175,00, you will pay R 125.00, i still ask her how possible is that, she said, it was possible. I still asked her on our further conversation if we are upgrading, as she now carried on about upgrade. With the upgrade, i normally take a cellphone, as these phone lifespan is almost 2 years, apparently, effective 01/06/2019, i have been upgraded to R 175.00 contract, on sim card and no phone. Why would i move to R 175.00 with no cellphone , i would have rather stayed on U choose R 160.00. I have tried calling Vodacom on the31/05/2019, spoke to their consultant, as i advised, i would prefer downgrading to R 125.00 contract and get a Samsung A10 or A20, which ever has U choose R 125.00, she said, i cannot do that, until the 15 of the month, and she will call me. This to me still sounds very not right. I hope Vodacom, can now fix my dilemma. Gladness Nontuthuzelo Nkosi (Ms)