Uber Eats

I am very unhappy with uber eats and won't be using them at all in the future. I have been struggeling with the app ever since I tried ordering and choosing the cash option but it said that the payment method was not available and since then it didn't even allow me to change it back to card option. (however this was months ago)

Since that issue I haven't used uber eats and even deleted the app. However yesterday I got a notification as follow:

FNB :-) R313.20 reserved for purchase @ Uber Eats from cheq a/c..524665 using card..8753.

I didn't order anything I don't even know what restuarant this was ordered from and we didn't receive anything. I am extremely desgustedby this as I always speak so highly of uber but after this I refuse to use them and willbe telling other people to rather use Mr Delivery.

How can I get my money refunded?