Hole in my gum which I can noticebly see dental implant through! Had dental implant 18 months ago that failed then had another

Had 5 bone grafts after noticed hole in my gum! returned to my dentist who said could be fixed with a soft tissue graft which I've had. went to another dentist who told me my dentist had tried to give me vertical bone graft which is not possible & they had done such a bad job inevitably the implant will have to come out dentist still insists further tissue grafts will correct problem I still have no time frame as to when it will heal it's so stressful I really don't no what to do anymore