Bad service and customer relations from Lancet

I have been a regular customer at Lancet for many years and have found their testing facilities and the staff at those facilities to be world class.Unfortunately I find their accounts dept do not operate on the same level as the rest of their business especially when you request to speak to someone in a supervisory position you get put on hold with music playing in your ear for a long time and when you phone back another call centre agent takes your details and promises you will be called back which never happens.I am A very regular patient with Lancet who in my opinion treat us paying customers with utter contempt.These charges were for what the medical aid did not cover and were paid promptly and when I queried those charges were part of the amount paid.In my opinion this sucks