Woolworths did not credit my payment

on the 1st of December, Woolworths debited my account by means of Naedo Collection, demand deposit. I did not do an EFT or direct deposit. They have yet to credit my account, insisting on me sending a pdf proof of payment, however, since this is a debit order, I cannot supply a pdf proof of payment. I did supply the transaction details and a copy of my bank statement proofing the amount went off on my side. More than 10 emails, numerous phone calls, each time explaining my problem like it is the first time I have raised it. No proper feedback which is strange. Held on today 20 min, no one answered, 4 calls in one day, each time I got cut off. Several emails and calls to complaints department, queries and missing payments, Still no resolution. Pathetic service, I just need my payment credited!!