Tank Catastrophe

Well I have just came back from a holiday with my aunties and cousins to my mum telling me that last night at 2 o'clock she woke up to the sound of my filter burning out and then she filled up with water to try and stop the pump from burning out. And now I just came back from my holiday to an indescribable tank. It stank, There was dirt everywhere and several of the fish were dead. I have now entirely cleaned out the tank and the remaining fish u have put in a spare tank and the plants in a bucket I really do hope they survive I am getting a new pump in a week and advice ? Also if you were wondering the fish that died were my two silver sharks and my long armed freshwater crayfish. I AM SO SAD!!!