you are complaining here about stuff 2 weeks after you left the place, instead of right away.
Moreover, this pricing issue is everywhere in Sri Lanka: first asking is a good rule. Tuk Tuks prices are regulated by the drivers association and every driver has the table. One ride to Pottuvil and back costs the same if it is with people or stuff, and consider the wear on the Tuk Tuk because offroad driving and that fuel costs in Sri Lanka as much as in Europe. Riding around in Tuk Tuks is one of the most expensive things you can do; sourcing food from the locals and bargain as the local customs, in particular among muslims is far more efficient.
Of course you can use the kitchen cook and clean yourself, which is the standard way of renting a holiday home. If you ask Ryas to cook and clean for you, just agree between you two before instead of complaining later. The cleaning fee is for a normal cleaning: if there is some time lapse after the last guest and it is windy, some leaves fall from the roof into the toilet and have to be cleaned again: this is more quickly done by asking Ryas than going through the resolution centre.
S.I. number is in the booking confirmation email, at the link you did not open with all the instructions. Without reading the instructions I understand you had a difficult time.