Thomas Cook India Ltd. — gst tax invoice not received

1. I had paid a total sum of Rs315166/-, including GST, by Account payee cheques to Thomas Cook India Ltd for a conducted trip to South Africa, Kenya and Zambia in March/April, 2018
2. We returned to India on 06/04/2018
3. Since then, I had been regularly requesting Thomas Cook India, both verbally and in writing, to issue me a proper GST Tax Invoice, as per Section 31 of CGST Act, 2017.
4. After several reminders, on 23/05/2018, I received through Courier, an unsigned xerox copy of an Invoice for Rs 121255.52 only, under SERVICE TAX REGISTRATION NO-AAACT4050CST010, which is no longer valid, after introduction of GST from 1st July, 2017.
5. Thomas Cook India, Kolkata, has a GST regiatration no---it is 19AAACT4050CIZQ
6. Everything was wrong in this Invoice--Not Original, Not signed, No Rouding Off, Unknown rate, Under Invalid Service Tax Registration No AAACT4050CST010, inspite of having GST Registration No 19AAACT4050CIZQ. Not for the full value charged--INR 315166/--Not within 30 days for Service. Even the GST rate charged for the part amount --Rs121255.52 was 11.54%, a rate not known to me. GST rates are always a round figure.
7. Request assistance in getting a proper GST tax invoice from Thomas Cook India Ltd, as per Section 31 of CGST Act, 2017--Original, signed, giving full details of CGST & SGST charged under various heads.