I want my refund money

Recently I’ve ordered on UberEats and have missing items.

I wrote a complaint and requested for my refund. The keep saying that they have refunded me which they haven’t. Whenever I communicate with them regarding this the send a message that this was resolved and then close the case which the prevent me to communicate with the unless I open and a new case which is also then closed and so on and so forth. Therefore my problem is still not resolved and I still haven’t received my money. It shouldn’t be taking more than a month to refund someone. And they must not say I must go to the bank because the same way they took the money is the same way they can refund it. This is for two separate orders.