Yes of course as it is not a html file but php…So I contacted hosting company (again) and it is alright now. They deleted another html index file but no idea where it was??? So issue resolved. Many thanks
Ok so I got back to them and insisted that likely issue may come from hosting and finally it is all sorted out now despite last week they said it was not their fault. I must say that most of the problems I met for installing WP came from hosting company. Many thanks