Yup, been getting some of these and can't seem to block them. Tuition agency too.
For those who are bored, go to this , type in the number/name on the sms and you can usually find the agent details (if the bugger is registered). If you have a few of their details, just go propertyguru, find some properties that they are selling and use the other spammers' contacts to make an enquiry... Like I said, do it when u are really bored...
I did this when they sent me a sms and I am very free: go to the dnc website, click on register online, fill in their number, select add number to registry, then click proceed, they will received an otp and I will just keep clicking resend otp to spam their sms until I am bored.


uniquely sg. 