Block spotify on mikrotik 6.33

Hello everyone,
In out office we have a limited internet service (30GB per Month) and because all users (30 users) have Spotify on their computers, I want to block Spotify application access to it’s servers to reduce internet usage, I have used webproxy solution with no luck, used queue tree feature to limit access the sub domains of Spotify (on 1 bit/s to almost block it) ==> No luck, Also installed its application on my PC and traced the IP usage and tried to block them one by one but still no luck,
So Can any one help me to properly block Spotify? I mean to block all sub domains of its server Or
To Block Spotify IP Range 194.68.28.* Or
If I can limit their internet usage on daily period, For example 100 MB per day and tell them its your queue per day and use it any way you want, that would be appreciated too.
Thanks in advance

I don’t know if thats work

Paste that in “IP” “firewall” “filter” in new terminal

add action=drop chain=forward comment=“block spotify” dst-address=194.132.168.0/21 out-interface=ether1_wan
add action=drop chain=forward comment=“block spotify” dst-address=193.235.232.0/22 out-interface=ether1_wan
add action=drop chain=forward dst-port=4070 protocol=tcp

CAUTION! ether1_wan must be adapted with the WAN site of your Routerboard
I’m not sure about this if this works i’m not a firewall expert
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