Here is the Real Roku Customer Service Phone Number: 816-272-8106
If you search for Roku Activate Phone Number or Other Roku terms it is very possibly you may come across a phone number that claims to offer Roku support. But they will not help you until you give them your credit card. This is not the Real Roku Customer Service.
Remember Roku Customer Service is FREE. Do not give them your credit card number. Hang up the phone immediately and do not give them any personal information about your Roku.