Google Detached Retina What Is The Best Way To Reattach An Vinyl Inground Pool Liner?

What is the best way to reattach an vinyl inground pool liner? - google detached retina

We had installed the siding last year and this year, when I opened it I found the vinyl siding has been separated into several points. I called the installer, but are apparently too busy to call back.
Please do not Google the answer, I've done it.
Thank you in advance for your help.