Still waiting for refund / Exceptionally ******* customer service & company

My experience is the same as most of the others who are using Yoco. DON'T USE YOCO! I have had the poorest of poor customer service experience with Yoco and their staff. We returned our unused Yoco device to them on the 7th of October. A month has passed and still no refund to us. I made contact with Jaysree who escalated the matter. Then I followed up with Gadiija who is exceptionally poor at her job. She just does not even listen to a customer and just tells the customer what she is going to do (and never does it anyway) and ends a chat. So now I have no other route to than rate them us utterly ******* and hopefully someone who has more experience responds to this and does what they actually should.