House construction contract GST

G Singh (Cap) (72 Points)

15 March 2020  
Good day all,
I have given my house construction contact to a Architect. we have agreed fixed rate of 1500₹/sqft ( including all taxes). He agreed to provide GST invoices of all the items and fittings used in construction and finishing, However now he is either providing fake invoices without GST or refusing to give any invoices. He seems like doing tax evasion. what should I do ? Can any action come on me ?

your prompt reply will be highly appreciated.