Sheets2GCal is provided by GCalToolkit as a registered French Individual Enterprise (Siret: 534 063 912 000 16 not liable for VAT).
Please feel free to send questions, suggestions and complaints to info at sheets2gcal.com.
For bugs and other technical problems please post to Github here:
Sheets2GCal: https://github.com/GCalToolkit/Sheets2GCal/issues
GCalExtras: https://github.com/GCalToolkit/GCalExtras/issues