Too long to review claims

On 5 November I emailed proof that blood tests done in April were resubmitted in May to be reprocessed under the maternity program, thus proving that it was NOT a stale claim. To date, after numerous calls by myself to follow up, I keep getting told the claim is still being reviewed. In the interim I have been handed over to ITC for this outstanding account - NOT IMPRESSED!! I can’t understand how a claim takes this long to be reviewed?!?! How many more times do I still need to call, e-mail and escalate the claim before it is settled.