Outstanding Bill

I have been a member of Bonitas for a long time and have always received excellent service. I am currently experiencing an issue regarding a Lancet account who is hounding me non stop for payment. I was hospitalised and Lancet drew bloods. Bonitas paid half the bill and Lancet is hounding me for the balance of approx. R4000. I have made over 20 calls to Bonitas and resubmitted the bill and lab notes and was advised that it was paid however when I called in yesterday I was told it was still being assessed. In the interim Lancet call and email me asking me for the R4 000 which I don't have. If someone could please look into this and advise as it is very stressful. Jacob confirmed payment of the balance was processed last Thursday however I am yet to receive proof of payment which lancet is asking for. Please can someone help. thank you