Hi,
I've more than 5+ years of experience in kannel and bulk SMS development panel .
I can provide you full SMS panel that you're looking, from re-seller account creation to admin manageability. Whole solution is developed on Latest Technology i.e Angular + Asp.Net core web services due to which its reliable robust and high available.
It has all features, where you can upload SMS excel sheet to live reporting.
let's discuss more over it and if you want you can take demo as well
Regards,
Mukul Agarwal