Best buy credit card -They advertise 0 % APR and interested for the first 18 months, after which time 24 % interest kicks in. At 18 months, I suddenly had {$360.00} in interest charged to my card, on a balance of approximately {$600.00}. When I called the company, they explained that the interest balance reflects the accrued interest on all past bills over the first 18 months. 
