Persistent Latency >1500ms

This has been going on for over two weeks, a tech came out last week and replaced my ONT and hooked up a Verizon router. They were able to confirm the latency issue and opened an outage ticket, however that was closed with the note 08/27 "NO CURRENT OUTAGE - PON TEST NORMAL - ISSUE CLEAR - UNABLE TO TEST CUSTOMER AS THEY ARE USING 3RD PARTY ROUTER"

Is there any way to get support that is able to troubleshoot this issue?

This is what a ping looks like plugged directly into the ONT for the gateway being assigned by FiOS: 64 bytes from 173.50.102.1: icmp_seq=0 ttl=254 time=6329.914 ms 64 bytes from 173.50.102.1: icmp_seq=1 ttl=254 time=5523.484 ms 64 bytes from 173.50.102.1: icmp_seq=2 ttl=254 time=4524.180 ms 64 bytes from 173.50.102.1: icmp_seq=3 ttl=254 time=3752.654 ms 64 bytes from 173.50.102.1: icmp_seq=4 ttl=254 time=3829.778 ms 64 bytes from 173.50.102.1: icmp_seq=5 ttl=254 time=3535.151 ms 64 bytes from 173.50.102.1: icmp_seq=6 ttl=254 time=2871.856 ms 64 bytes from 173.50.102.1: icmp_seq=7 ttl=254 time=4527.291 ms 64 bytes from 173.50.102.1: icmp_seq=8 ttl=254 time=4761.777 ms 64 bytes from 173.50.102.1: icmp_seq=9 ttl=254 time=4931.161 ms