Could anyone help?! Customer care and in-store couldn't help me.

I'm not a 100% sure why third parties do contracts for Vodacom. I had to get a new device on my phone contract, but my LTE insensitive fell away. That has NOTHING to do with my actual phone contract. Now I can't get hold of the company that gave the insensitive to move it over or get it back! It's something I was supposed to have for 2 years, which has only been a few months now. It took me almost 6 months to get it sorted out last year and now it's gone! Please can ANYONE help me get this sorted out?! As I went in-store and I phoned Customer care and no one could help me! I'm tired of sruggling with Vodacom. Especially with all the huge increases.