T56 Modem freezes randomly and not works again until turn off/turn on

Hi, sorry for English.

I have just switched from KPN fiber to Odido fiber. My connection is installed on 2nd of November and since then T56 Modem keeps freezing randomly. Once it freezes, internet connection drops, impossible to connect to Wifi, impossible to connect to modem via ethernet cable and not possible to enter modem admin panel and it never comes back until I turn off and turn on the modem. Once turned off and on everything comes back immediately without an issue. 

I have contacted the support on the first day (2nd of November) about the issue. They told me to wait and note every drop, which I did, and they told me that they will call me back today (6th of November). Which they didn’t and I call them back instead now they told me to wait 5 more days. Which is unacceptable, I am a software engineer and working remotely, I need to be online whole day without interruptions as I am always on zoom meetings and relying on working internet connection. I have smart home setup which controls all my heating and lights, it is impossible to control my heating/lights without network, which it would work with local network as well but not working due to the modem freezes not only internet connection drops.

I have been reading the community and I see that lots of people having exactly the same issue with this modem and I don’t understand why Customer service keep us waiting although the issue is obviously with Modem and I just need a modem replacement with T54.

I have been using KPN fiber with the same connection and never had a single issue with in 3 years, so I am pretty sure my connection is not the issue.

Please help me to get a replacement T54 modem, I need this issue to be fixed as soon as possible as it affects my work.