Rain network disconnecting

I have been happy with rain since I got it in January and I got a second sim to replace my ADSL which keeps disconnecting. Sadly, I am considering keeping my ADSL because I have sent two emails to Rain and only got a reply on my second one.

First, I asked if we can get an unrestricted APN. My husband works from home via the internet and needs a stable open connection, especially for his calls (our NAT is strict). (No reply on this request).

Then, since yesterday, we are having major problems. Signal keeps dropping and my husband gets disconnected from his business calls. I sent an email yesterday afternoon. We have a brand new Huawei B525 router.

Please, can Rain just inform their customers if there are underlying problems causing the current outages. I see many people have problems at the moment and many aren't getting replies. We really need proper internet. (We live in Hennenman)