Hi jaspenhof,
Please try using the methods below to connect your PIXMA TS7720 to your Wi-Fi:
PIXMA TS7720 - Manual Connect to Wireless Network
PIXMA TS7720 - Using Easy Wireless Connect - Windows
PIXMA TS7720 - Using Easy Wireless Connect - macOS
If you continue to have difficulties, please contact one of Canon's Technical Support Representatives via phone or chat. To contact a Technical Support Representative, please use the link below to log into your My Canon account:
https://mycanon.usa.canon.com
Once logged in, click on your PIXMA TS7720 and then click on the Product Support button. When that page loads, click on either the Phone Support button or the Chat Support button to access support.
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