W.P.
I have used Harvey Chapman of Chapman Home Maintenance ###-###-####. Now he has only done plumbing work for me so I'm not positive if he does other stuff or just plumbing. If he can't help you I'm sure he could refer you to someone.
Also when we had that problem with squirrels we used fox urine to get rid of them. You just put some on a cotton ball and put the cotton ball in the hole. It scares the squirrels away. I'm not sure where my Mom got the fox urine, from a store or in the mail. If it was from a store I'm sure it was Redentas in Arlington. You could ask the exterminator, they may have some too. Much more humane than killing them, and it would give you more time to get the hole fixed. Good Luck!