Wrong order delivered

Bought 2 items and on delivery, I noticed wrong items were sent to me. Contacted superbalist to inform them and 3 days later they send a courier to pick the wrong items up. It's been now 2 weeks, and I'm still waiting for my right order having sent back the wrong one. I've sent more than 10 emails and more than 6 agents have promised to sort out my issue ,have me refunded or sent the right items that I ordered. Each time I call or email, I'm dealing with a new consultant who either knows nothing about my case and order or will escalate further then they disappear. What a frustrating ordeal t go through .