Mtn upgrade

On the 17 of June 2022 I received a phone call from one of MTN direct reward partners offering to assist me with my upgrade of my account, two of my contracts was upgraded. On the one account I took a data package which was processed correctly. The main contract however I requested the MTN Mega Talk XS package, I still informed the agent that I am fine with the small amount of data as I do data sharing off the data package, on the 22nd the evening I found the contract in my spam folder of my email and noticed I was placed on the MTN Mega GIGS XS, not the package I requested. I phoned the MTN call centre 135 on the 23rd and informed the agent of the mistake, she advised me that I can take delivery of the phone from the couriers and that the issue will be solved. I sent an email explaining same on the 23rd, but only received generic responses. On the 27th I took delivery of the phone. After checking the MTN app I noticed that I am still on the Mega GIGS XS. I then contacted the call centre again and was put through to the rewards agents, they told me there are three options: 1. live with the wrong package, 2. Take the phone in to MTN shop and register a dispute within the 7 days cool off period, or 3. Wait for a courier to collect the phone after 3 to 5 weeks. All options are extreme inconvenience to me as a client, seeing that the mistake is not on my side. I herewith request MTN to review this matter and migrate the package to the correct plan, I do not see why it can be so difficult as both plans are the exact same price, both get the same cell phone device.