SunLife repeatedly claims they have not received my faxes

How often have you heard of them claiming to not receiving faxes despite being sent once a week x 3 weeks. I scanned and emailed which they acknowledged. Then it was my employer had not responded but the HR person had sent it that am. I called again 2 days later and still haven’t received it. I said obviously your FAX is broken, so they gave another one. Called today and everything is there but it will take up to 5 business days to determine the claim. I’m afraid I lost it at that point and said that I have been doing my part for over 4 weeks and I have to wait. I have had nothing coming in since my surgery. On March 15, I had a large mass (necrotic fat tissue) and have a Wound Vac since then. The original size was 21cm long, 6cm wide, and 7cm deep.I hope they respond soon. I am a 62 y/o RN SUPERVISOR who was working full time and want to go back . I hope to work at least another 10-15 years.