Insulate the front and rear facade with balls.

Insulate the front and rear facade with balls.
Was done 1.5 months ago.
The wall feels even colder than before.
Isn't crazy with -5 outside, but actually couldn't.
I was commented that it should take a summer to warm through.
I can have it checked but through an official body and it would cost me 450.00. If it turns out that no good work has been done, I will get my money back. 450 ??????
I wonder if it insulates better after the summer in the winter or if they have just been telling me something.