Cable error 8180 (English)

Dear T-mobile,

Since we moved into our new apartment we've been getting cable error 8180 and no internet.

I reached out to your customer service everyday since then, and despite your promises to be contacted by KPN to fix the issue, yet still waiting, and have to share my phone internet data to be able to work from home!

(I also have a T-mobile phone unlimited data subscription which is limited to 5GB per day which is not convenient as this limit is quickly reached!)

Could you please look into my issue again, and also confirm I won't have to pay for this period of time without internet?

Thanks for your attention,

Regards,

Antoine