Resize A4 PDF to Custom

My PDF is currently set up as A4 (210 × 297 mm) and I simply need it converted to a new, custom size that I will provide in millimetres. Nothing in the artwork, text or images should be lost or distorted—please scale or reposition the layout so everything stays crisp, centred and print-ready... (Budget: ₹12500 - ₹37500 INR, Jobs: Adobe InDesign, Graphic Design, Photoshop, Print Design, Visual Design)