You cannot say that turning off the heating gave your father a chest infection
£79.15 is SSP and the correct amount for a weeks full time work so your father has collected more in SSP than he would have had he worked
http://www.hmrc.gov.uk/calcs/ssp.htm
If the boss wants to take keys and phones belonging to the company do you think he is not allowed to? Your father can return at a later date and collect his tools
Can you explain the 7 out of 12 payments? Does your dad do blocks of 16 hours for £104? and has so far done 7?