Disgusting rip-off.

Worst lack of service ever!!

I asked for a quote for getting my car licence and delivering it to my house. They quoted me for the licence and their fee, which includes the courier to deliver it to me. I accepted the quote and paid them and sent them the necessary documents. Now they have my licence but wont send it to me because they have added a whole lot of charges which nearly doubles the amount I paid them. I asked for the details of what all these extra charges are for, and they refuse to tell me, and nor will they send me my licence .... where to from here? Do yourselves a favour - stay far away from these thugs, its just a rip-off / scam.