Linking SIM to Account that is different to where it was ordered.

Hi All,
As per the subject, I recently purchased a SIM through my existing account for my father and paid the first 30days.
Upon the SIM arriving, I activated the SIM and created a Lebara account for him. As part of that process I tried to link his new number to his new account. I receive the OTP successfully however when it is entered I am advised it has expired (within seconds of it arriving). I have tried several times.
Anyone experienced this?
TIA

Contact Lebara support via chat or phone

BigBird86 did you get this sorted. i have the same problem. spoke to someone on the phone. but could not understand what they were saying