Tenant not moved in yet

[Leora A.]

Lease began 4/1. Tenants just texted me and said they still have not moved in fully. They’re in the middle of trying to sell their house and have only stayed at the house for 2 nights this past weekend. They were supposed to give notice when away for more than 5 days.

In the same text thread, they’ve notified me of water hammering when the toilet flushes and that the shower head leaks and with hammering.

How would you address or Handle this?