i've been down the english small claims court process before, and is was a great deal of aggravation, and took a long time, as the person i took to court kept finding spurious (and, it turns out, fictitious) excuses to delay the hearing - i pursued it to the end because i'm a stubborn sod, and felt it was a matter of principle. i won, and regained my money, with interest, and some additional compensation.
in retrospect, however, it probably wasnt overly healthy for me, and i would have been better off letting it slide.
it seems that if the usual residence of the person you wish to claim against is overseas, you can't use the UK small claims system. as they are in germany, you will need to use the european small claims procedure, however this appears to be only applicable for claims of less than €2000. if you are after more than this, i believe you have to use the national court system in germany...and that will definitely involve solicitors, significant fees, and even more inconvenience and cost on your side.
this link gives some additional info: hmctsformfinder.justice.gov.uk/courtfinder/forms/ex725-eng.pdf
i understand your anger and frustration, but really consider hard whether this is an avenue you think will be worthwhile to follow, especially, as others have said, the problem well may be temporary.