urgent advice ?

Sorry this sounds like absolute Bull****.You can ask for the case to be reconsiderd- to appeal in other words against the decision.Having an argument with either your boss or a client is not a diismissal situation unless of course you used violence in which case you could face a police prosection.
Betting wise - if you backed all the horses I have done for the last 17 years you would have made a small profit over long periods of time.
Eg. last 6 months oct -mar profit £1360 max bet £50. Total bet £5580 .
This is peanuts I bet for enjoyment the idea being not to lose a lot of money.
To make a reasonable amount say to live on? Ave wage? £24000 I would have to place bets of £900. If yoy have a bank of at least £6000 do it but dont loose your bottle.
Multiple bets forget it - but you may srike lucky always include in your selections at least 1 horse with odds of 12/1 plus.
Do not get a large win and think by putting the whole winnings on the next selection will work ,it might but chances are it will loose.
By the way I have had 6 winners ina row twicw, not scoop 6 either, but these bets were over a period of 7 or 8 days.
Good luck!