Failing to deliver on commitment

I ordered a dress for my Baby's Christening on 1 March. Before doing so I requested confirmation that the dress will be delivered on time. They indicated that it should not be a problem. I therefore paid for the dress and sent the proof of payment. I almost immediately got a response which indicated that the <br> Order will be placed once the funds show on their bank account and delivery will b between 20-25 working days later. I immediately responded to the mail again requesting them to confirm that delivery will be before the 1st and if not I would like to cancel the order. After that I sent various mails. I got no response. Today...I sent another mail requesting a refund as I received no response. Within 2 hours I got a response with the excuse that they never received my mails ( I always used the same email address). They said I will be refunded if the dress is not delivered on time. I responded that Unfortunately I can not rely on possible delivery and again requested a refund. I received the following very professional reply : \Madam. You placed an order with us. You can not cancel an imported item unless it is damaged in transit not on a whim"Really NOT a Posh Boutique !!!"""