Change of plan error

[Sacchen5]

I have tried to change my plan online but I receive the following error:
E:adsl_comm:thread_exists

[luisc]

Hi Sacchen5, 

Welcome to TPG Community!

Normally it happens when you still have something pending on the internet service.

I advice you to contact service delivery department

[Sacchen5]

Hi luisc,
Thank you getting back to me. How would I go about contacting service delivery department? I've tried calling the customer service number and online chat, for 3 days and no one has been available.