This is what I'd do. Tell 'em you want it back within the next two days. If not, you want all your money back, and you're replacing it with a Winchester. Maybe also mention something about all the internet forums too
. That should get their attention.
Did you get verbal confirmation as to who was doing the repairs? Remington contracts out to smaller "mom and pop" type companies regularly. Unfortunately, not only do many of them do a terrible job, but it takes forever. If you ever send a gun to Remington for repairs, you can specify that it go to the main facility in Il (I think that's where it is). that will usually insure the job done right and fast.
A little story about some customer service problems I've had with a different company. When I bought my first AR (Bushy 16") I ordered a bunch of 30 round Orlite mags from a certain mail order co. with the intention of storing 'em for long term. Well, some three years after I purchased the mags, I get a sales flyer from 'em. I look at the AR mags to (smugly)see how much they've gone up in price yada yada. Well, to my dismay they're flyer now had a disclaimer stating "Israeli Orlite magazines may not fit Bushmasters". WTF, I immediately go and take'em out of storage to check. Lo and behold they don't fit. I call up the company and explain the shituation in full detail. Sales person on the phone actually said I was "shit out of luck" the satisfaction guarentee had expired. I was furious so I called back to get the name of the company President. I wrote him a long letter telling him what happened and how I was treated. I also mentioned that the shooting community is a small one (unfortunately) and that with the advent of the internet it's tighter than ever. He promptly sent me a letter apologizing profusely and offered to take back the mags, pay for the shipping and send me Orlites that fit properly at the cost I originally paid. He followed up with a call. Had the phone rep not said what he did, I probably would've counted my losses and grumbled to myself. It's amazing what a little dose of reality from a vocal customer can do. Also sometimes it pays to go "over the heads" of the people manning the phones.
Hope this helps,
R