Application for device

I received a call from a Mondo Sales Agent offering me a phone deal I proceeded with the application and with the entire process giving my bank details and accepting the mandate and was promised my device to be delivered within 5 days which did not happen. I then contacted customer services who advised me that the device was out of stock. the agent did not assist me by resolving the issue he kept saying that DSV will get in contact with me for delivery... its now gone over a week and nobody has contacted me regarding my order and this is disappointing.... all I wanted from them is to give me an alternate device taking into consideration that I have already completed the process of applying and completing the verification process which was so difficult..