Stop in for a cup of coffee

Yesterday was one of the hardest....fought to keep my temper in check. Couldn't wait to get home. pick up the mail and find that an ongoing problem with a credit card from Best Buy has surfaced AGAIN. To save money on a computer repair 3 months ago I put it on a credit card and if paid off in 60 days no interest. Well to keep it short first invoice never showed. second came and showed a $37 late fee call (1 hour) and get it taken care of or so I think. Send the $200... get the third invoice to find no show of the $200 AND a second $37 fee. So call the dispute line (1 hour 45 min) The guy tries blaming the post office. I finally come unglued. He says we will find your $200. Then after hours I get an email of the dispute for the $400 missing. I can't believe it...the dude f_ed me over so I have to get on to fix it AGAIN. And I cannot connect online.