Once again MTN increases subscriptions

Recently I noticed that the MTN Sky subscription on my contract was increased by R30 on the March and April invoices. (R1460.14 vs R1490.35)<br> In trying to get clarification on why this has happened I have received conflicting feedback from MTN.<br> When I queried it in March I was told it was an error and would be corrected on the April invoice.<br> The April invoice once again had the increased subscription R1490.35.<br> Now I'm being told that the previous subscriptions was wrong?!<br> When I signed the 24 month contract in May 2015, my subscription was set at a different amount.<br> 2 months into the 24 month contract I was informed that the subscription would be increased to R1460.<br> Now almost a year later I am once again being told that the subscription has been increased again (THIS IS WITHOUT ANY PREVIOUS NOTICE OF THE LATEST INCREASE)<br> Please provide me with a written explanation of:<br> 1. Why there is another increase in the monthly subscription (the second in a year)<br> 2. Where is the reasonable notice period of such increase (as set out in clause 10.1 and 19 of the contract I signed)<br> 3. Why is there conflicting feedback.<br> I sent this to Customer Care and was sent back to 808 (useless)