Sophia, you are a really RUBBISH plumber! Emptying the grease trap is a dirty job, but it doesn't need more than a bit of unscrewing fixtures. What on earth are you doing with a hammer and a hacksaw? Now wonder the sink sprang a massive leak and covered you in water. No, I won't be paying you for your time, and no, I certainly won't be calling you out again tomorrow to fix it! You'll damn well stay here on your own time, and wait for a proper plumber to arrive!