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Yes, if the account was not included in your BK, then you have absolutely every right to demand the CRA correct their reporting. When did you dispute? I ask because they have 30 days in which to investigate your dispute.
For the accounts that aren't yours, on your CRs, they have to list the CA or OC and an address. Phone numbers also sometimes appear. Are these CAs or OCs?
If they are CAs, then DV the CA.
If they are OCs, then send Experian a written dispute. You can dispute multiple TLs in one letter, so no need to send one letter per account that ain't yours.
Send your letters CMRRR.