I would offer every 2 weeks like has been suggested.

I refreeze once and have done so with no problems. After that, though, the prey goes to someone I *know* will eat it.

I had a male go 6.5 months last year without eating. Only lost <200g. Drove me nuts but he came back around.

Just keep up on your husbandry and he'll eat when he's hungry. If you're getting desperate in a few months or he seems to be losing weight quickly, you can cave in and try offering live. However if you don't have a pet shop that will take returns, you don't have anyone else to feed it to, or you don't have a humane way to dispatch it, you may end up with a new pet.