Paying the outstanding rent to withdraw the case

Hi,

I have lived in my current apartment for 14 years. This year in Jan 2020, I called the office to ask for my new rent details from 1st Jan 2020 to 31 Dec. They told me that I was having a court case as I didn't pay last year's rent.

I handed over 4 cheques in 2019, but I didn't wait for a receipt and never went to collect my tenancy agreement as I haven't done for almost 2 years.

They always handle things and I trust them. It turns out no rent cheques were cashed for 2019, no one in the office can find the cheques, no tenancy was signed and no one contacted me in a year. I assumed that the cheques were going to be deducted from my account.

What can I do?

Thanks!