Bajaj Electronics — inclusion of gstin number in invoice

Address:

Kothapet, Hyderabad, Telangana

I have purchased electronic items from bajaj electronics kothapet branch. I am working in andhra bank lb nagar. I have submitted bank dd to bajaj electronics. They have given me invoixe without including our gstin number. Our gstin number must be included in the original invoice, other wise i will not get reimbursement of the amount. I have requested for gstin bill but they are reluctant to give. It's my humble request. Please do the needful or else i will lose almost seventy thousand rupees. Please help me in this regard.