Dell put up the following official notice on its Malaysia website:
lazada.com.my is not a Dell Authorized Reseller
Dell offers and promotions etc. are not applicable for products sold by unauthorized resellers.
Representations, benefits and other entitles offered by unauthorized resellers will not be honored by Dell.
It is important to note that purchases from an unauthorized reseller may exclude you from Dell warranty, service and support. Dell shall not be liable in any manner with respect to requests being declined.
Exclusive offers, entitlements and other benefits for Dell products are available on purchases made on Dell Authorized Reseller.