Thank You Words

Question 1

Thank you for your hard work (talking to a senior co-worker for example)

Answer 1

O-tsukare sama deshita

Question 2

Thank you for your hard work (talking to a coworker lower than your position, or if you are the customer for example)

Answer 2

Go-kurou sama deshita

Question 3

Thank you for your hard work and I apologize for bothering you/giving you extra work

Answer 3

O-tesu o o-kake shimashita or o-tesu o o-kake shi, moushiwake arimasen deshita