nonrefundable

nonrefundable /ˌnɑːnrɪˈfʌndəbəl/ adjective
nonrefundable
/ˌnɑːnrɪˈfʌndəbəl/
adjective
Britannica Dictionary definition of NONREFUNDABLE
1 
of something you buy : not allowed to be returned in exchange for the money you paid
2 
of a payment : not to be returned