Device connectivity problems are usually caused due to instore WiFI issues.
Tangerpay specifications, recommendations and troubleshooting tips are provided to you at onboarding time.
A Store Network Alert email is sent by Tangerpay to the store owner every time we detect there is a problem connecting to a machine in your store. This email also contains a link to our specifications and recommendations document mentioned above.
Please refer to these and provide a copy of these to your IT network provider who can help further in troubleshooting any configuration issues in your store WiFI setup.