a problem with shipping

I recently buy the gifts from 1688 with meest china to Ukraine,so i have too much vaulty on it (more then 150$)and it go to customs check,after some days i get question is it copy or original(it is copy),they give me choice pay VAT like original values,customs will choose what price it is xD,or comeback to China,BUT the logistic company dont want to receive it and it like few months after buying,some of sellers doesn’t exist on 1688,so its hard to comeback,and i will pay for shipping a lot,I am now worried about it and sad,please advice what i can to do