Below standard service

My son went for bloods on the 23rd of August at Mauff a c & Partners. I see this amount has been rejected by Compcare. Want to know the reason for this as the reason for these bloods were related to his chronic condition. Please can you investigate.

In July I submitted a claim for my parents which was on the same invoice. The one got paid and not the other. It`s now September and still waiting for payment of the second script. Also not the first time it happens.