Call Limit not adhered to

Dear Vodacom<br> <br> I have a R50 Call Limit loaded on my Smart S lines, yet data of R381.27 was used by one of the numbers before the line was soft locked. I can understand R50 or R100, but almost R400? I understand your terms and conditions that a situation like this could arise, but still find it totally unacceptable. I was advised to change my contract to a top-up plan, but how is it possible for Vodacom to know exactly what is happening on a top-up plan but not on a regular contract?<br> <br> I currently have six Vodacom contracts and never had any problems like this before. It really leaves a sour taste in my mouth...<br> <br> Please don't contact me to explain the T's & C's, I get it...<br> Please don't send me the standardized response.<br> Please don't phone me (your previous attempt was a call ringing twice from a number identified as spam by Truecaller).<br> Rather propose a solution on this forum.