Incompetencent service

I started using the Fiber this month convinced by the sales person. After just a few days the fiber installed yesterday we had no wifi from morning till now the next day. I don't understand how can they as a company think we will do without it as we work from home. I will not expect to be billed for the days I don't have internet access because this is incompletent service and I am starting to regret why I opted to use them.