ADT billing *******

all ADT clients be aware of the following practise from ADT security, I am a client paying my monthly account rounding it off (example: paying R500 instead of R470). to my horror when i viewed my statement i noticed that ADT has a reference "DN" referred to as small write off. they in fact write off your excess payment not reflecting a credit anywhere on your statement. this money goes into a suspense account which they just take, simply just take your damn money, i am going to report this to ombudsman ADT are ****** and im cancelling my contract and demanding my money back, no wonder they support the damn Sharks with my money, ****** ******