At the time of setting up my new broadband, I forgot to use my friend referral link.
On the phone, BT wasn't sure what to advice me.
I am getting my internet fixed tomorrow.
Do you know how I can still get the voucher the offer has ?
If I am unhappy with my new broadband How long after I started my contract I can cancel without penalty
The Terms and Conditions of the contract you have agreed to are here.
See Section 5 of the BT Home Phone and Broadband section.