Tired of waiting for a reply

I ordered contact lenses and received it in about 3 weeks, which was fine. I saw there was something different and i contacted them about this matter. It was the right brand not the right contacts, which was my own fault because i did not see that it was not for presbyopia. I need to send back. Since abou 17 December, i have emailed them numerous times, tried to phone them, but no success. You cannot contact them. It is now 15 January On their reply email, they say that they will respond between 24 or 48 hours. That is NOT true