Telkom mobile increases spend limit without author

I have 6 contracts with Telkom Mobile my 10 year old son got this sms on the 24th February .<br> Dear Customer, your Spend Limit will be adjusted to R200. This will empower you to purchase additional bundles or call family and friends in case you deplete your inclusive benefits during the month. Regards Telkom.<br> <br> When I took out their cellular contracts I spesified that I did not want any spend limit on their accounts. The first time I noticed this is when I got the increased bill . If Telkom did this to 10000 customers they increased income with R***. What happens if I cannot pay the bill they then suspend me. If this happened to all my simcards thats R1200 extra I will have to pay . I DO NOT ACCEPT THIS AS IT US AGAINST MY CONTRACT . I SIGNED. LOGGED A CASE ON THE 3RD OF APRIL STILL NO CALLS