The worst service ever

I see that I am not the only unhappy person. There are so many bad reveiws for thus establishment. I have a Hyperli voucher that expires the end of this month. I am trying to call your Greenpoint branch since Monday on a daily basis but I can't get through. I sent an email as well to make a booking but no response. I even called your Waterfront branch and told the lady that answers that there's an issue with Green point's phone but she had a very bad attitude telling me there's nothing wrong with their phone and it must be phone. Well so many people have the same issue. You don't reply and your staff has bad telephone etiquette at Waterfront branch. Must my voucher jusg expire and I will lose all my money because of your poor service?