Angry former customer who wants their money back!

I placed an order on the Zando app on 14 December and the payment went through. Few minutes later, I receive an email saying the order was cancelled but money was taken from my account...I have been trying to get hold of them since that day with zero success! Their consultants are “very busy”. They don’t respond to emails, nor to queries on social media. Worst service I’ve ever received! I will stick to Superbalist, thank you very much