Upgrade gone wrong

When my upgrade was due I did not know what I would need going forward so I told Vodacom I didn't want to upgrade. Vodacom kelp calling me to upgrade and they said I could always migrate later. So I stayed on family top up (did not take a phone). Now I want to migrate to a R1000 package. I will then have to migrate and not get the phone I need. This is unfair and bad business. After 12 years I think I should find another cellphone service provider. On top of all that I would need to pay 75% of my contract as cancellation fee. Disgusting!!