Contract Migration - They called us!!! Now we can't upgrade!!!! grrrrrr

In Feb 16, VODACOM phoned us, as we hadn't upgraded for a no. of years. They said they would give us a Sim migration - which would be cheaper (& better for us)! Plus we were told we could upgrade when we felt like it. NOW we would like to upgrade, & guess what, we can't!!!! Only in 2018 November! As the sim migration is a NEW CONTRACT. This is the 2nd time I have contacted HelloPeter. Hopefully VODACOM will bend the rule - or the contract in this instance. I would not have done a SIM migration had THEY not phoned me!! All i get back is sorry!! That's the contract! What don't they understand, I was told i could upgrade when i wanted to!!!! they *****ed up!! Why can't VODACOM fix it!!! To tell you the truth, if i could I would just change to another SP! I would have thought after all these years, VODACOM would cherish the OLD customer!!! Obviously, I am just business to them. Nothing more! Please Vodacom, make a plan. Check when last i changed my phone???? goodness sake! Is it that much to ask? Oh VODACOM if you are interested, my cel no. is ********** 460