No Delivery after 2 months and no Feedback

We placed an order on crocs Website on the 28/11/2014, the order arrived about 2 weeks later with only 2 of 3 shoes ordered. I called immediately but couldn't get through after 3 days of trying to get hold of the head office and a few emails later, I finally got through & I was told to email Allen Thomas, I did as I was instructed & no response I then called again & said I need some sort of proof or confirmation that my shoe will be on it's way & that I am still owed this shoe! No response! I then went to their website customer service & logged a query on the 19/12/2014, all I received was an automated response. Nothing else! I then called a few times and no one answers & if they do Allen Thomas is busy we can take a msg but he never calls back, the person on the line will confirm we missing a shoe but will never send an email to the effect. I then logged another complaint on their website on the 26/01/2015 asking for either my shoe or a refund & to date nothing! This is ridiculous service. If you don't have the shoe give me an alternative of sort or a refund or at the very least some feedback!! And to top it off it's a kiddie shoe by the time it arrives will it still fit my son?!