Hi There,
I can help you. I had more than 50+ implementation for e-invoice & e-waybill with various GSP/ASP (few are from them are: ClearTax, MasterIndia, WebTel, TaxPro, TaxZilla, Saral GST, GST Robo, etc)
Please let me know how can we connect to fix the issue. Given estimate are just for bid, can be less or higher after discussion and details of actual issue.