Amazon told you how long it might take in their email. No one here in the seller forum can tell you how long it might actually take. You have to wait on Amazon.
They've also stated no further action is needed unless you have additional (new) information.
It's advisable to not contact them again unless you do have new information you want to give them.
Thank you for this post @Seller_343Wo5ehcISad- after review, I can confirm that the best next step is allowing the review to be completed, which can take some time.
Should you have new information, you can submit it to be included in the review, but this can elongate the review period. In case it helps, I'll include this seller university video on creating a Plan of Action in case it proves useful.
Should you have any further questions when this review is completed and a response provided to you, please feel free to revisit us here on the forums.