Buvons not bouvons. It really doesn't sound like beevons, although hearing the difference is quite tricky when you can't see a face in front of you, or when the sound quality is not perfect. Say "Bee", then make your lips into a tight "oo" as if you were going to whistle. Hold your lips tightly in place in that OO and say "bee" again. It should come out like the French bu ("drunk"). Now add "vons". Buvons.