eBay

Seller sells to my country & the country that I want items shipped to "for free". When trying to pay for my items, & going to "check out & review", I change the shipping address, ebay's "! change your shipping address or contact seller to request an ...

I recently asked a seller why my bid & others were cancelled & the item(s) removed. Was to "STUT UP!". I replied with "this shows your mentality" to which he responded with a bunch of verbal abuse. What can be done about this?