DoubleDown Casino Dishonest Gaming Practices, Ripoff credits, Internet

Have been playing DoubleDown for several months, they charge on your credit card to play, but there is no cash payouts, only credits. Have never received any kind of major win. Have been disconnected several times over this period but always reconnected to continue play and collect pay out. This time??  Spin landed on 5 of a kind blinked to confirm the win with an approximate pay out to be in access of a hundred million credits. Before the credits were paid out , site was disconnected, and was unable to reconnect to the site. When I was finally able to reconnect, credits were not given. Contacted them , they admitted that this was a problem that they were having with the site and it was trying to be fixed but they refused to reimburse the credits. I did not ask for a cash refund. Contacted the second time and they claimed that there was no way to verify that I indeed should have received that amount of credits or that the spin had indeed landed on the 5 of a kind. They charge real money to play on the site but conveniently disconnect when there is a major payout and claim it is a computer glitch. In layman's terms it appears they are running a crooked game. They should be investigated , this is not a free play website. This is where the fraud comes is in play.