The payment we had mentioned is not the only cost for copyright.

(I think it is better to omit this sentence)

It also includes a thankful reward for your efforts to compose the report. So if you have not had any problem receiving it we still would like to provide it regardless of copyright.

-The payment mentioned does not include the copyright cost. ( alternative sentence )

(I have to read the entire message several times but I have a hard time pinpointing the main translation error. I think something does not make sense here  )

translation error: payment - not the only cost in obtaining the copyright but you also mentioned a "thank you" reward.  These two things are contradictory.

It also includes a thankful reward for your efforts to compose the report.

-It also includes a gratitude reward for your efforts in completing/organizing the report.

So if you have not had any problem receiving it we still would like to provide it regardless of copyright. ( too wordy, disorganized)

-Regarless of any circumstances, we still would like to acknowledge your efforts.

(issue: redundancy and translation)

Thank you for taking time out of your busy schedule.
I will be waiting to hear from you.

Yours sincerely.

-


dear Vanessa
Thanks again
Does email seem to be ending smoothly?