Even someone took them to play on the game and they finally loss the game with the amount showcase here, they don't have to nlame anyone but o themselves. Because there were two options for them to select. Either they say no or accept the influence. And they accept the influence and luck gone out from them. And I don't think in the amount would just leave the opay without their permission. That their part of the story is like a blasphemy because Opay is one of the best online banking apps in the country.
And we don't have to blame anyone foe our downfall and mistakes we do in life. Gambling is purely for luck and if you don't have the luck to win and anyhow you try there would be no win. So they should not blame the App.

I think if a person blames someone that he has lost in gambling that he should not be a gambler 
A gambler is not so weak that he starts to cry about losses and blame other people that because of someone else, he faced the loss. He chooses to gamble by his own will, no one forced him to gamble and therefore in case of a loss, he is solely responsible for this.

I have learnt over the passage of time, that you are alone in gambling when it comes to the money in gambling. If you win, the money is yours and if you lose, no one shares or take the responsibility of the loss. The profit from gambling is only for the person gambling and the loss is also for the same person.