Done upgrade with out my permission

On the 25/11/2020 I visit the Galleria vodacom branch to do a upgrade on the following number *** there was a special on laptops for black Friday, the staff member that assist me I will only receive the laptop by the follwing week , there was no stock available in-store, on the 27-11-2020 they contact me to come and pick up the laptop, but the same day I received a call from a person working in the call centre offering me the laptop deal, I said to him I have already done one at Galleria mall, he was not happy and put the phone down, the night when I went to the store to collect the laptop, I mentioned to her that someone called me from the call centre and want to also to give me a deal and I said no when she wanted to print the contract see a notice that the person from the call centre had cancelled the deal and she had to reload the contract, only this month I notice that I am paying for to cell phone contract when I contact vodacom they said I have two contracts and I only suppose to have the one, the person from the call centre activated the other one with out me giving permission.