Google India / Tez — regarding failed transaction refund

Sir,
I have used 'google pay' app to transfer ₹6000 on 16 may 2019 but due to bank server error it was failed, i have provided all my details on this transaction and bank statements all screen shots. But they are repeatedly asking me more time to resolve my complaint and statements again and again. They are repeatedly asking me 7 days etc. Whenever the deadline gets finished they are giving me new reason and ask for my updated statement as soon as they receive my statement again they are saying "your problem is under process we will work with npci, you will get an within 7 working days". This is going on since last 1 and half month. I'm not getting any updates and refund.
Sir please look into this matter