The port that your ISP plugs into, that should be a tagged port, I would think. Also, make sure you have jumbo-frames enabled on all ports.
But I might misunderstand something - in your photo, which part is the ISP with their Cisco gear?
From what I understand (bear with me, I *just* recently did this and had a million questions about it), you don't need vlan test1/test2 on port 1:1 on the top/bottom switches. Unless those lines only exist on the customer switch, in which case things should work
You don't care what vlans the customer runs; they just tag their vlans on their switches to the port that connects to your top/bottom port 1:1.