I purchased a wireless Logitech keyboard and mouse online but its few keys were not working. Its keys were malfunctioning. If I enter space calculator was opening and its "R"button was not working. I called on their customer care number and asked for replacement. They asked me to bring the keyboard and mouse along with bill. I went there and submitted the product after few days I got call from them they said the replacement us arrived and I can collect it. I got replacement easily and the new keyboard is working fine.