Yearly increases, 24 months contracts to 36 months and out of bundel 2c

Seems Vodacom is just out to see how much more money they can get from their loyal customers. You have to pay to see who is calling you. Every year, they increase contract costs on existing contracts. Is a contract not binding? How can they increase your contract cost? Is this not the reason for signing a contract? Now, if you renew your contract, you have to make double sure that they don't put in 36 months because this is also a new thing seeking in. And because VAT did not go up, they are increasing out of bundle by 2c. Vodacom, this is getting out of hand. One of my contracts is up for renewal; do not automatically renew, as this is also happening as a new service we do not require.