Worst accounting system ever!

I have never had issues at point of service with Lancet, but their accounting system is probably the worst I have ever encountered. This year we had several accounts that were not paid by the medical aid. We then received notification from Lancet about unpaid accounts. This issue with their account is that the reference numbers all look the same, so you are constantly battling to see which invoice they are sending you for payment. The second issue was that the notifications they send, doesn't necessarily open with the main member's ID or DOB, so we couldn't open the notifications to see the account details. The third issue and probably the worst was that they handed us over to debt collectors for an invoice we never even received! Then the debt collector wants me to give my personal details when they phone me, but they don't send me the invoice they are collecting so I can check what needs to be paid. This was honestly the worst and most unprofessional experience with Lancet yet and their debt collector too! If I could have it my way I would never use them again because it is such a mission to just get the right information to pay their account.