@abss
Hello, sorry that we don't provide call-back service, it is suggested to contact the local hotline service if you prefer getting help via the call:
https://www.tp-link.com/en/support/contact-technical-support/#Hotline-Support
It is also suggested to follow the below troubleshooting to narrow down the configuration issue:
What should I do if I fail to configure TP-Link Range Extender?
If the above troubleshooting doesn't help, please log into the web UI of this extender and show us the full screenshot of the status page. And please export the system log to us which you can find on the settings-system tools-system log.
Additionally, please provide the model number of your wireless router, which may help a lot for further troubleshooting, thanks.