My landlord calls me 3-2 times a days

That is kind of creepy. Are you paying him on time?

At this point I would make sure he’s not planting cameras. They make incredibly small ones that are barely noticeable.

You need to start looking for a new place to stay, because your landlord is probably a disgusting creeper who wants to plant cameras.

Can look around my basement all you want, but you pretty seriously want to stay out of the attic.

That may be against the law in your location. Here in CA a landlord has to give reasonable advance notice before entering a unit.