I bought bitcoin few days from a UK seller and paid the same day via bank transfer, but today after 3 days the seller opened a dispute it says "Your trading peer has requested support due technical problems"
my arbitrator is: swfmgmb2aoyqxkte.onion:9999 any help would be appreciated
Well, the arbitrator will probably contact you shortly through the app.
I would try to be patient and wait for it all to get sorted out.
I know that it can be nail-biting experience if this is your first time, but I can assure you that these type of stuff happens all the time and arbitrators are always fair and understanding in these situations.