Money Not Reimbursed by Checkers

The wrong item was delivered. I did not ask for a substitute and yet Checkers took it upon themselves to substitute the item I had ordered with the wrong item. I reported this at least two days ago and asked for the item to be collected and a reimbur*****t. I have not heard from anyone, the product has not been collected and there has been no reimbur*****t. This is not the first time a query sent to Sixty60 has gone unanswered. I am going to be very hesitant in future to use this delivery service. The app is already frustrating enough. I do not need these other issues as well.