Not much I can add to what's already been shared Ro. After reading what everyone's said I think you'll know you did the next indicated right thing.
I've been working with a sponsee for years, he's slipped so many times that I finally had to admit that he was just between drinks. Rarely has there been any earnest recovery on his part.
I saw him a few days ago at a meeting. He's a couple weeks sober, this time he's saying he's experienced a "quantum change" and he's found a meeting that's working for him. I hope and pray that he's found a sponsor that works for him too, he hasn't called me in over a month.
I've never fired a sponsee, but I won't leave claw marks on them if they don't have the desire to stay clean and sober. I'm just leading by example, sharing what works for me, and turning it over to God since He's doing the guiding anyway.