Why decline my claims when I brought forward evidence?

Hi, with the mentioned business I'm very angry at how you never rendered a service that was part of your duty. Firstly in all these casinos I lost money I lost R1.2million in 6months and its so amazing cause I hardly used my bank account as I won large amounts and those winnings are the very same ones I use to play not money in my account. It's so amazing looking at my Bank Statement most of the things there are ridiculous!.... The Withdrawal's that were done at these casinos amaze me there was a point I was not even in Jo'burg but in my statement I done transactions in Jo'burg how did I do that? Standard bank declined my claim without further investigating it as I was using it from long ago and I trusted that they'll keep my money safe. I didn't know they were so negligent R1.2million is not a small amount now I'm struggling and I can't take care of my wife and 1 year old daughter who also had to quite daycare cause I can't afford to pay for her. I lost a flat,furnisher, clothes,money and cars. Now I'm suffering with my family and all that you do is decline my claims by saying what best suits you at that time. Worst ever I got banned in all three Casinos is it what you do on a regular basis. You have shamed Tsogo Sun as I trusted it. Are you taking advantage Standard Bank or are you covering up for your employers?. I received the worst treatment from you. I need to know why my claims were declined when I brought forward valuable evidence?