The issue
The failed component was the double-glazed sealed unit rather than the complete window frame.
A failed double-glazed unit was replaced in Paisley while the surrounding frame was retained where it remained serviceable.

This page expands one of the supplied Premier UPVC work examples so you can see the job in context and follow through to the relevant service.
The failed component was the double-glazed sealed unit rather than the complete window frame.
The sealed unit was replaced independently, keeping the surrounding frame where it remained serviceable.
This supplied Paisley example demonstrates the repair-first distinction between failed glazing and a window that genuinely needs full replacement.
Send a photo, postcode and short description. Premier UPVC can then identify the most useful next step.