Irritating service

Goodness from one issue to the next issue so I have been trying to pay my account for 2weeks now I have asked for banking details en ref nr at no avail it's now the end of the month and I have gone to standards under bank authorised beneficiary and selected Lewis stores I first tried paying using the contract no but payment return and said not valid I then tried using my purchaser nr and it went thru on the 1st now the keep sms me about payment so I phone cape town to allocate the payment to my account such a hassle they can't find payment I mean really one thing after the other