It happened to me yesterday, we are facing huge internet challenge that have disrupted various activities including those of big multinationals, banking and mobile phone operators. It is a total mess in my country right now and some other neighboring countries are not exempted. The internet connection is fluctuating haphazardly and very weak. Yesterday while placing my bet, I typed the amount and sent, then the network was frozen for a while as if it was not responding so I had to send it multiple times with getting the confirmation of bet being placed successfully. It was after the internet became a little stable I noticed that I had placed the same bet several times even to the point of exhausting my account balance. Unfortunately, one match cut the bet, that was how I lost my entire asset. It was painful but I had to accept it that way.
I would blame the internet for that but it would be unfair if you are not blamed for it as well
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If you already knew that the internet connectivity was causing problems throughout the countries and the neighbouring countries, you should have double-checked before trying to place the bet again, it is your mistake if the bet was placed multiple times because you should have waited for a few minutes for the internet to become stable and then you should have checked whether the bet has been placed or not.
Well, hard luck, and I feel sorry for your loss. This will at least teach you a lesson that you shouldn't do things that involve finances when you have an unstable internet connection.