Discovery no payment again.

Discovery's claims department keeps messing around with me. I submitted a claim in January as part of my PMB and it was denied as using the wrong code. No problem, the the****** submitted a new statement using the correct codes, which should have solved the problem. Now, more than a week later, I've had to phone Discovery again twice to chase up on the payment, but I am not getting an answer or explanation from them! I'm so tired of having to go through this every single time I need a payment from them and wish I could simply cancel my plan with them (sadly I can't because of the policies we have at work). What am I paying Discovery for?