Dashboard not allowing access all

Hi - my site mywikaniko.net on your dashboard will not grant me access. when I go to network admin>dashboard I get a "you do not have permission to access this page error message" Have been on to my hosts who say they dont see it their end, but have tried on different browsers/laptop etc and get same thing - am 99.9% I gave you guys access a few days ago, wondered if someone could let me know how I can fix the issue?