Simple Assessment contact phone number

I used your online service to speak to someone regarding a query I had with regards to a simple assessment. I was told that I would need to speak to someone at Simple assessment on the phone who could help. The number I was given was by the online chat was 0300 200 7835 but when you call this number it is dead. Can someone please clarify the correct number? Please note I do not want the Self Assessment number I only want to talk to people in the Simple Assessment department as they are the only ones that can deal with my query.

Hi,

You need to contact the Income Tax team to discuss your Simple Assessment tax bill.

Income Tax: general enquiries

You can find guidance here:

Check your Simple Assessment tax bill

Thank you.