Will never use Lancet again

My daughter went to a doctor who took some tests and sent them to Lancet - not that we knew where the doctor sent the specimens to. At no stage did we ever come into contact with Lancet - did not see the people or have any interaction with them. Yesterday I received an sms from this company - exceptionally unfriendly - Pay your account to Nedbank *** Branch Code *** amt R708.20 ref *** Call ***. So I dialed the number and gave my reference number. They said I was overdue in paying my account and it needed to be settled immediately. I asked what the cost was for and was told tests for my daughter. I asked for a copy of the Invoice so I could verify this. They had all of my details on their books so why did they not just send the Invoice to my email address and remind me to pay an account that I had no idea was outstanding. I have instructed all of the doctors that we deal with NEVER to use Lancet again. Ampath is so much better - much friendlier - send the bill directly to the Medical Aid and if there is a shortfall - they call and ask for the payment in a friendly and professional manner. Why is Lancet still using the Postal service which is totally unreliable