Vodacom Fibre

Vodacom fibre should be ashamed, I had fibre for 6 months before moving from Midrand. I was sent an invoice to payoff the router, i paid it in full and closed my account. I relocated to Waterfall where the fibre is done through clear access. I told clear access i already had a router, I had paid for the router in full so technically vodacom has no claim on it. I was surprised when the technician told me the router had been blocked not to be used by other SSPs by vodacom. I called them twice and got a different story on both occasions, the second lady i spoke to said that i needed to use vodacom has my service provider before they unblocked my router. Is this not *******?, is this not a form of extorsion?. Why make me pay for the router if it is not re-useable unless i opt for your services again?.