Urgent: Large Amount of Jitter Interfering With Work, How to Increase Buffer?

I am getting a very large amount of jitter and it is making it hard for me to do my job.

Is there any way to increase the buffer on the router to compensate for the jitter?

I believe the cause of the jitter is my bad ISP, but I am hoping I can correct it with more buffer

FYI, Configuring SQM to reduce Bufferbloat