2 questions

[panzers]

Why am I always getting my supplies attacked and also, I am not able to disembark from my transport.
I have explored all options and I just don't see it

[AlvaroSousa]

Just like in the real war the opponent is constantly harassing your port supply lines.

You have to be more specific in the 2nd one? Most likely cause is that you just took a port. You can only unload in a port that has supply.

Transport/Invasion Fleet—This is any fleet with a land or air unit. This fleet may not attack other fleets but does defend vs attacks. They may disembark a land or air unit at any supplied port. Ports are not considered in supply the first turn they are captured. They can use landing craft to invade enemy beach and coastal hexes or disembark at any friendly coast. - page 67

This was a 1.00.06 modification that I forgot to put in the new rules book. So I updated it and will upload shortly

[panzers]

My infantry is in Saint-Nazaire and there is no option to disembark

[AlvaroSousa]

You have to be more detailed in what's going on.

You don't know where the button is?
Did you just take the port?
Are you on a port or a coast or beach?

[panzers]

Not sure what else you need to know. They are stuck there on the transport and I see no way to unloas them.
They are British infantry trying to land on Saint-Nazaire

[sveint]

Press the little anchor button.

[AlvaroSousa]

Post a screen shot please. The anchor is on the land unit in the fleet about lower left of the unit.

[panzers]

there is no anchor icon.
I have seen it before, but not on this unit

[ncc1701e]

Please could you upload a screenshot? It will help to answer you.