Matrix Cellular International Services Pvt Ltd — no high speed network

It has been 3 weeks since my first email and I haven't heard back from anyone from Matrix.
Ihad taken the Matrix Europe package 25GB high speed data.
But there has been no proper coverage anywhere in entire Turkey. None of the cities I got proper network.
The speed is too slow and I have been able to use only 1GB in 10days which is not acceptable. That too with interruptions in voice and video calls.It was absolutely useless. I have been asking for hotspot from my friends and relying on hotel wifi. This has been really embarrassing for me. I need my money back since your customer care wasn't able to fix the issue.
Dipti Pai - [protected]