Smashing Commerce — does not cancel my order

Hi,
I have ordered on 6th July 2018, pest repellent - ultrasonic machine but due to product bad reviews I have cancelled my order via email, but they are not cancelling nor picking up the call. Even I tried calling them on the helpline number. Please insist them not to deliver the product to my address and cancel the order.

The customer service manager is not picking up the call nor responding the call. It is very annoying.