What refund? and what customer service??

I have now been struggling since 23 June 2018 to get a working Garmin Vivosport watch. It is not syncing to my or any other Samsung phone. I am on watch 3 already and they keep sending me watches and none are working. I keep asking for refunds and I am not seeing anything. It is a struggle to even get them to return the watch to them. This time I am already struggling for 2 weeks! I would complain about customer service but there is none to complain about, they don't even follow up as promised and love putting the phone down in your ear or putting you back in the waiting ques for somebody else to deal with.