So TSTT send a voucher in the mail where you can get $10 off of your internet or land line phone bill. Yesterday I went into TSTT to pay my bill, and I asked the CSR if I could use the vocuher here. He said no.
Now I know he isnt the one to be mean with, so I held my tongue, but WHY cant I use a voucher that TSTT sent to me in a TSTT BRANCH???

What is the purpose??

No really....what is the purpose?