Claim not paid

I submitted a claim on the 21st June 2018, to date my claim has not been paid, firstly my claim was calculated incorrectly and I had to call the call centre for them to remediate. Why is taking so long to pay my claim, why do I have to be the one who every week calls in to find out what the delay is, does it really take close to a month for Bankmed to pay claims, this is an absolute inconvenience to me, I have paid the supplier and now I am out of pocket...Why???