Only Qatar Airways Sales offices can book the quad seats.
Please contact +974-40230031 or the nearest Qatar Airways Sales Office or Contact Centre to select your seats.
Visit this link for more details on Qsuite https://www.qatarairways.com/en/onboard/qsuite.html
Please contact your local Qatar Airways office for further inquiries. Contact details can be found in the following link https://www.qatarairways.com/en/worldwide-offices.html