To be fair, the last handful were posted by what was likely a compromised profile (says they joined in 2011) and within the span of less than twenty minutes at a time before most people are conscious. Give them a chance to wake up, first.
The first post says this, thanks to Google translate..
"GoPay has a WhatsApp number at +62 857-6990-8715 for promotional purposes and marketing information. If you have a complaint, don't hesitate to contact 0857-6990-8715. We are ready to help you…"
When you run across such posts hit the report button in the posting. We are not always on line when they come through and may not see them. We will be notified on the website and by email when you do. We can then log on and take care of things.