Ukraine
When sending to Ukraine the Sender ID will be overwritten to "ClickSend" unless you register you own Brand or Business Name.
To receive replies you need to purchase a Ukrainian dedicated number and add "please reply to NUMBER" to your messages.
This is a network level restriction to meet Ukrainian regulation and we have no control over this.
You can select your dedicated number here:
https://dashboard.clicksend.com/#/numbers/sms/search