Phrase for ending up paying for having done a favor

In my mother tongue (Gujarati) there are two phrases describing the adverse effects of doing a favor. What are their English equivalents, if any?

The phrases are:

• આંગળી આપેને પ્હોંચો પકડે (someone) is offered a finger and (they) grab the hand

• ધરમ કરતા ધાડ પડી Making a donation and getting robbed. ધરમ કરતા more often means performing religious ceremony, so another interpretation could be to get robbed while doing pooja.

Your first example has a direct equivalent:

Give them an inch and they'll take a mile.

No good deed goes unpunished.

(A phrase I really dislike)

Another phrase (in addition to those mentioned) could be "biting the hand that feeds".

Here is a literal observation of this phenomenon: my girlfriend was trying to feed a neighbourhood stray cat, and the cat (being rather mean and nasty) scratched and tried to bite my girlfriend's hand.

Camel's nose is a phrase to describe the ill-effect that could result when doing a favour.

It is a reference to the famous Arab fable where an Arab offered a camel's head a place in the tent, but the camel slowly entered completely, thereby pushing the Arab himself out.