Cannot link payment to order

I place an order with MRP Online on 6/1/18, paid 8/1/18, made the money avaialable immediately as i needed the curtains for tenants moving into a property of ours. Since then up to now they keep giving me the excuse they cannot link my payment to my order, yet they have my money and i have no goods. This is *****, nothing less, nothing more. I have shouted, scoulded, phoned 10 times + BUT THEY JUST KEEP IGNORING me they do NOT PHONE BACK when they have promised, i am contemplating opening a ***** case at my local police station. My last email to MRP Online help centre came back: YOUR EMAIL WAS DELETED WITHOUT BEING READ