Bad Service MTN The Glen

Went to MTN The Glen on Monday 14th March I went there to renew my contract. At the store I spoke to the consultant think his name was Ricky. I told him my needs as a pensioner on a mobile device and he recommended a Hisense phone. He did not give me options but went straight to Hisense as a phone of choice. I have been an MTN customer for over 20years and trusting his advise and signed the contract at the store. When I got home I realized that the Hisense was not my phone of choice coming from a Samsung Note10. I did not use the device and just kept it in the box as it was handed to me at the store. I went back to the store on Thursday the 17th of March and spoke to Ntombi and Yoshna the supervisor. I explained to them that I don't want the Hisense device but rather I want to stick to the Samsung devices. She said that she cannot do anything for me due to it being a contract. I explained to her that I was cohersed and encouraged by Ricky to go with Hisense and I wanted to stay with Samsung. This contract is one sided as the benefits go to MTN and not myself as I am not happy with the device that I was pushed into buying by MTN consultant. According to the consumer law I have a choice and I am asking MTN to grant me that choice to change this device for a device of my choice. MTN please do something here or cancel this contract.