Stratum Gap Cover, Poor!

I had a fairly large shoulder operation more than a month ago. I made sure all was in order before the operation, Medical cover, Gap cover with Stratum. A month later Stratum has still not settled the Gap payments. 9 Phone calls, several emails, mostly repeat send items, because Stratum can't allocated files to cases due to a system Migration. The only answer : "We are busy with a system migration and the files can not be uploaded and they will not be processing claims in the next few weeks. Try again next week" ! This has a significant impact on patient/surgeon relationships, follow up consultations. Poor service !