why is vintagewatches_2018 so dishonest, I bought a watch from last and all now I cannot get it

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I bid on a Seiko mens watch blue dial last year with Vintagewatches_2018 and upto now I cannot get my watch, He promised to refund me and I still cannot get my refund and he has stop taking my messages. This is dishonest and the behaviour of a scammer, I want back my $25.00