We advise all customers who are experiencing issues with hardware, accessories or DLC to contact their device's support service in the first instance. The majority of issues can be resolved through troubleshooting over the phone or via email/chat services to limit any inconvenience to you.
The following websites have a wealth of support information in relation to troubleshooting for your selected product:
Elgato: https://help.elgato.com/hc/en-us/categories/360001538352-Customer-Service
HyperX: https://www.hyperxgaming.com/us/support
Nacon: https://my.nacongaming.com/en-US/support
Nintendo: https://www.nintendo.co.uk/Support/Welcome-to-Nintendo-Support-11593.html
PDP Gaming (Afterglow): https://support.pdp.com/hc/en-us/requests/new
PlayStation: https://www.playstation.com/en-ie/support/
Razer: https://www.razer.com/eu-en/contact-us
Roblox: https://www.roblox.com/support
Roccat: https://eu.roccat.com/pages/contact-us
SteelSeries: https://support.steelseries.com/hc/en-us
Trust: https://www.trust.com/en/support
Turtle Beach: https://eu.turtlebeach.com/pages/contact-support
XBOX: support.xbox.com/contact-us