Hair system base too big or other problem?

[DarkStranger]

I've noticed the last few times I've applied the hair system I got. It gets creases in the base and easily lifts a few cm at the back right after applying in those areas.
Either the base wasn't cut to the right size or more of my bio hair has to be shaved off.

Before I f*** up either. How can I be sure?

However I have noticed permanent creases/wrinkles in the full French lace base. Is this because the base is larger than my balding area?

Hair system is SuperHairPieces M105. They already fucked up and forgot to do remote cut in when I bought it,and I paid extra for that option.
So had to have it done elsewhere. Luckily they refunded their mistake.

But I wonder if the base was even cut to the right size either.


Edit:
When I have to take the hair system off again. I'll measure the balding area and the hair system base size.
And will see if the company made a f*** up or not.

I guess it's better to properly cut the base to the right size,than to trim off more of my bio hair to make it not lift.
As IF the base is too big, it probably isn't fitting my head shape correctly and causing the lifting;