Missing items and poor service, plus refusing bro refund my money

I placed an order online, my package was delivered but as I notice I had a item short, so I never received one item I was back and fourth with the customer team but to no avail, I was just advise will be escalated and they will get back to me, which never happens unless I reached out to them, was advised Monday that my item was lost or warehouse have no idea what happened to it, the customer advisor advised me that my money would be in my account I would be refunded in the next 24 hours which also never happened and still waiting on my money it's pathetic for a big company like Mr price to take your money for a purchase but when they maake mistakes and lose customers package its a struggle to get your own money back, poor service, only worried about taking your money but not refunding or resolving your query.