Discover how to obtain a proforma invoice: request an offer from our agents or configure your order by adding products to the cart, finalizing with your details, and choosing "Bank Transfer" as the payment method. Find the invoice in the order details. Contact us if you need help.

If your payment has been declined, check that the bank details are correct and that there are sufficient funds. Orders are automatically canceled if payment is not received within 7 days. Make sure to complete the transfer on time to avoid inconveniences.

Discover how to apply your discount code in our store. Simply enter it on the cart page, under "Summary". If you have any issues, contact us via [email protected] or our online chat for immediate assistance.

GroupSumi guarantees secure shopping with over six years of experience in online sales of electrical, plumbing, and HVAC materials. We offer efficient customer service, secure payment methods, and are backed by TrustPilot to ensure our customers' trust.

Discover the variety of payment methods we offer for your convenience and security, from cards and transfers to advanced options like Google Pay and Apple Pay. You can also choose to pay in installments with Klarna. If you have any questions, contact us and we will be happy to assist you.