False advertising

I purchased a bunch of studio monitors from their website on black friday. The speakers was and still is clearly marked as pairs but they delivered them as singles to me. As much trouble trying to make contact with Toms Braamfontein the lady tells me that is was an online error. Why couldn't you guys tell me this before dispatching my order. Now their phones don't work and the lady in question does not reply to my emails. I WANT MY MONEY BACK AND STOP FALSE ADVERTISING!!!