File dormant accounts

I Had the following message from companies house:
Next accounts made up to 28 February 2018 due by 30 November 2018. Last accounts made up to 28 February 2017, from this i understand we need accounts submitted from 28 feb 2017 to 28 Feb 2018.

We have not traded during this period. Our first trading was from March 2018.

Is it ok to purchase your file dormant company accounts.

also going forward, if we want you to file our company accounts, what will be your charges.

thanks