Duplicate debit order and rude consultants

Old Mutual duplicated my debit order and is delaying the refund. When I call, they send me from pillar to post. To top it all, the consultant in the call centre, Janeet, is extremely rude and does not give anyone a chance to talk. She is of no assistance and just tells you to listen while she talks. When you call the complaints line, they transfer you back to the call centre. No help at all!!