In addition to the Unresponsive PM process, you can send a message to admin @ wikitree.com, asking that they compare the profiles to see if they are the same profile and should be merged. They can quickly review the dates or connections to see if they look to be the same.
You can propose the merge now and ask admin to verify if they appear to be the same. Maybe forward that email that you received, if you can find it, to admin so they can see that the PM doesn't care what is done. Part of the Unresponsive PM process is that they will try to contact the person and if no reply received, they will orphan some or all of the profiles where the person is PM.
Have you tried sending the Trusted List request from the Lash-106 profile, which is in the bottom of that block about Trusted List on the profile? That is one of the steps of the UPM process. If they answer that, you will be able to do the merge.