tnt didn't not deliver london, Nationwide

I sent parcel by express delivery from Riga to London on 15/03/13 and been promised to get it in 48 hours.I didn't get it in 48 hours, on 20/03/13 when all deadlines passed, I contacted Barking Branch in London and been informed that it couldn't be delivered as driver couldn't find my address.I also been informed that there is no going to be delivery in next 24 hours as all drivers busy now.I had to take taxi and went to the TNT/Essex myself and picked it up.There was to apology and customer service was rude.I would like to ask for a refund as I paid 25 for service I didn't get.