Version 1.0 · Effective date: 5 July 2026
This page provides all contact information and guidance for reaching Siudym Advisory for project enquiries, support requests, billing questions, or any other matter relating to our services.
1. Business Details
| Trading name | Siudym Advisory |
|---|---|
| Legal entity | Sylwester Jan Siudym — Entrepreneur Individuel (EI) |
| SIREN | 106 711 872 |
| SIRET | 10671187200015 |
| APE / NAF code | 7021Z — Conseil en relations publiques et communication |
| Registered address | 12 Rue Vieille du Temple, 75004 Paris, France |
| info@siudymadvisory.online | |
| Telephone | +34 671 141 701 |
| Website | https://siudymadvisory.online |
| VAT status | TVA non applicable — Article 293 B du Code Général des Impôts |
Business registration details can be independently verified at data.inpi.fr/entreprises/106711872.
2. How to Contact Us
2.1 EMAIL — PRIMARY CHANNEL
Email is the preferred channel for all enquiries:
All incoming messages are acknowledged within 1 business day and receive a substantive response within 1 to 3 business days. Response times may be slightly extended during French public holidays.
Email is suitable for:
- New project enquiries and scope discussions
- Requests for information about a specific report type
- Questions about an active or completed project
- Invoicing and payment queries
- Refund or cancellation requests
- GDPR and data-protection requests
- Any general correspondence
2.2 TELEPHONE
A telephone contact is available at +34 671 141 701. For complex matters, we recommend initiating contact by email so that a written record is maintained throughout.
3. Project Enquiries
To request information about a specific report, please send an email describing your requirements. Include the following where possible:
- The type of report required
- The market, sector or audience to be analysed
- Your required delivery date
- Any specific focus areas or requirements
We will respond with full details and a confirmed delivery timeline within 1 business day.
4. Ordering and Payment
All services can be ordered directly via the website checkout. Payment is made securely online at the time of ordering. An order confirmation is sent electronically upon successful payment. All delivered reports are sent to the email address provided at checkout.
5. Refunds and Satisfaction Guarantee
Siudym Advisory operates a 14-day satisfaction guarantee on all delivered reports. If a delivered report does not meet the agreed brief, a full refund may be requested within 14 calendar days of delivery. See our Refund Policy for full details.
6. Data Protection and GDPR
You may contact us at any time to exercise your rights under the GDPR, including the right of access, rectification, erasure, restriction, objection, and portability. All requests are handled within 30 calendar days. See our Privacy Policy for full details.
If you are not satisfied with our response, you have the right to lodge a complaint with the Commission Nationale de l’Informatique et des Libertés (CNIL) at www.cnil.fr.
© 2026 Sylwester Jan Siudym — Entrepreneur Individuel. All rights reserved.
Siudym Advisory · 12 Rue Vieille du Temple, 75004 Paris, France · info@siudymadvisory.online