Makro Poor service on a retuned online purchase

On December 6th, I retuned a microwave online. I received an email confirming the collection, which has been completed. However, there has been a no communication thereafter. When I contacted the customer service center, they were unable to provide any information and suggested I reach out to the specific store, Makro Carnival. Upon contacting the store, they confirmed they have the microwave. Unfortunately, Precious from the store mentioned that there is currently no information available regarding the status of the return or the next steps in the process.