Played last season ,after season was over I was unable to equip my pen tuvala helmet,pen tuvala ring ,pen tuvala necklace just says(you are trying to expand the slot more than the maximum capacity) but when I hover over the items they show no stat's atall even with auto arrange it put the items at the bottom of inventory 

Is your items inside the grayed out part of your inventory? Sounds like when you're trying to grab them, it's accidentally clicking the pay to expand button.

If it is, You could either drag and drop the items to the accessible area, turn on auto sort if you have space (Make sure the filter is toggled), get a value pack, or use inventory expansions (There's items and quests per character for this)