Refund of alcohol duty on export of spirits and wines to Germany

Ladies and Gentlemen, at first please apologize my poor english and the mistakes I will make due to that. I operate a small business in Germanyand and I do import wines and spirits from the UK to here. Unfortunately the british alcohol duty is paid on these goods and the wholesaler that I buy from refuses any help on getting this refunded. Does anybody here know whome to ask or which department of HMRC is responsible on this? Any help will be kindly appreciated. Kind regards, Volker I. Lipper 

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Hi vlipper Volker Lipper
Are these customs charges paid to German customs or UK customs? If goods are exported from UK to Germany, they will not incur customs charges by UK customs as these are exports. 
Guidance available at: Check duties and customs procedures for exporting goods
Thank you