Outstanding refund

By the end of December last year, I was already owed R999.73 by ADT for alarm items that had been replaced and returned. The refunds were 2 months overdue already.<br> <br> Earlier this year ADT deducted R715.82 from my account for an 'outstanding amount'. However all my invoices had been paid in full.<br> <br> I sent an email through to Ms S Mahlobo in Joburg 3 weeks ago with attached invoices and proofs of payments. I still have not received an answer as to what the additional deduction was for nor have I received any feedback regarding the outstanding refunds.<br> <br> ADT now owes me a total of R1715.55 - this is unacceptable and is equivalent to more than a year's worth of monthly subscription fees. <br> <br> I cannot understand how such a large company can be so slow to sort out this issue!!