Excess Roth IRA contributions by IRA conversion

I was confused by my trustee and converted too much from my IRA to Roth IRA.

I understand that I should take out the excess with interest earned and report the interest earned to avoid excessive taxation.

Can I put money back into my IRA (recharacterization?)  or this is forbidden now?

If I recharacterize or withdraw by the end of the tax season, should I report these operations (Conversion and Recharacterization or Withdrawal)? Will I be able to report as my Roth IRA contribution only the difference between the initially converted and recharacterized/withdrawn?