Seven to eight hours a day, but "asked" to work overtime 6-7 days a week. This is not always optional and you will not get notice in advance and it will be in "your best interest" to work.
8 hours, but expected to work more, then when you try to claim time back or overtime payments management either ignore you or claim you arnt using your time properly.
The mmd Whatsapp communications is the way to put it you will be expected to be available 24 hours a day to answer Whatsapp txt
7.5 hours a day however you never really leave as you are harassed via WhatsApp and phone calls from management outside of contracted hours.