Bad services

In December we bought a padlock from the East London Vincent branch and paid R350 cash. February 22 a debit order of R350 was made and my husband went to the branch and showed them an invoice as proof of payment and lady called Xoli was attending to him and promised to escalate the matter but that was not done and I also called the offices and was attended by Phindi who promised to request for a refund but till today a month later nothing... I have received bad services from ADT I am not impressed at all.