'translation', according to thesaurus, a word ending with -tion indicting a state, condition, action, process. Thus according to the term 'translation', it could be translated to 'penerjemahan' (an act of translating) instead of 'terjemahan' (translated article or text)

However, 'terjemahan' is also a common term used in translating 'translation service'.

The term 'jasa' is used for the word 'service' as 'jasa' also synonym for 'service'. Anoter equivalent words to that would be 'layanan' and 'servis'.

it is pretty straight forward