Sporadic and unreliable panoramic WiFi service

Since I perpetually have trouble even as close as 20-25 feet away, how would an extender fix things? And as to the rest of the house, how many extenders does one need for reliable service? And I would truly be surprised if these were supplied free of charge. I think this is nonsense! I have been a customer since 1998, but your company has lost its charm in my eyes. I believe it's time to explore my other options.