Flash vending *****

Hi I’ve been a vendor for Flash for more than 20 years when it was still called Sharedfone then TakeitEezy then Flash co-op now Flash linked to PEP stores. My problem is our profit has been disappearing from our machines of which we have 2 and we have complained about it and nothing is being done about it . I have given them all the proof of technical ********** activity in their systems algorithm activity happening on their backend. The call center is no help and we have lost hundreds of rands already . They say a manager will call back but no one does. Please assist