Bad service

I am very disappointed in the service that I got from spec savers N1 city. I've ordered my contact lenses about 3 weeks ago. A week ago I've received an sms to say that there was some or other issue and that i must contact them. The lady who was supposed to help me was busy and I was promised that she would phone me back. Needless to say, it's a week later and I haven't heard from them. I urgently need my contact lenses as I've been wearing the current ones for almost a month now and do not have any spare ones.