how to automatically daily sms send to perticular user

Question

which one solution is better

 

1) WCF Service

2) Web Service

3 ) Timer

4) other options

 

and explain which option is better n how???

 

When “ Parents account should be blocked if the late fees goes beyond 3 months “ As per Regulus software considered late payment charges on Tuition fees only. If Tuition fees pending then reminder of pending fees along with account deactivation Automatic SMS will be send by software before 10 days.