Help for supports

Hello, hello,
I’m fed up with supports!!! I can’t get a support that works.
I’m using “PLA Mate” for my part and supports, and “Support For PLA” as an intermediate layer, or “PETG”, but it doesn’t work. The intermediate layer doesn’t stick to the rest and makes a big mess! It’s a nightmare.
Am I doing something wrong? Are there any special settings I should use? Help please

Here is the first layer of “PLA Mate” after the 3 “Support for PLA” layers
nothing stick together !!

Nobody have some idea or can help me ??

Can you post screenshot of the whole model and your support settings?