Bill Limit Fee Pd yet exceeded by +R2k

I have 3 Autopage Sim Contracts - all three have had Bill Limits set for in excess of 12months. A fee is billed monthly for this service. Whilst the small print states that from time to time the bill may exceed the limit set while they wait to receive the daily billings from other providers i.e when roaming. The limit on my one sim is set at R50. I received a bill of nearly R7,000 for the month of October for the 3 accounts which I queried with Autopage to ask how a bill limit could exceed by so much. Lerato Sello emails to advise that I had only set the bill limit on 31/10/2015. I advise that this fact is incorrect &attach 12 months worth of statements to prove that the bill limit was set in 2014 and the limit fee was billed to my account. Lerato advises that the contract states clearly that from time to time a bill limit may be exceeded as they wait to receive the billing costs from 3rd parties. I then ask Lerato to plse provide an itemized billing for Oct. the bill then proves that on 7th Oct they had the bill standing at R83, far over the R50 set. yet they allowed the bill to grow and grow. to date have sent 3 more emails and not rec a response but am out of pocket !