3rd Party claims delays

I have experienced the worst service and ridiculous delays of my claim as 3rd party, They'll tell you turn around time is 30 working days then they request something something on the 28th day nd when you ask when will this be resolved they say the same thing then say "from the date we received all documents" which means the counting is starting from scratch,such pathetic customer service is honestly unacceptable!! That moment mind their client is the one at fault. Mxm