kay.akast

After I submitted my tax return on time (22 Dec 23), I received a letter in July 2024 advising that I owed tax and that I would need to pay a penalty for not paying it. I successfully appealed the penalty notice, as my return was submitted on time and with no errors and set up a repayment plan to repay the outstanding amount (which was not collected via my tax code, which it should have been) over 5 months. I was then subsequently told on another call that I didn't owe any tax and the first payment I made was refunded and the payment plan cancelled. However, I have now received another penalty for not paying the original outstanding amount, which I have again appealed, but I need to find out whether I actually owe anything or not. I tried contacting HMRC by telephone, using the number provided on the letter, but after holding for 30 mins, was told it was the wrong number and got cut off. I have tried calling back twice, again holding for around 30 mins each time, before getting cut off. All I am trying to do, is to find out whether I actually owe anything or not so that I can get this resolved and stop getting penalty notices (my statement it shows zero balance outstanding) - could you advise the correct telephone number to contact, or address to write to. I want to get this resolved before submitting my return for 2023/24. thanks