You need the house code number from blue or yellow owners' book to open an online TM30 account. Also, without a contract you won't be able to renew your retirement extension it is one of the submissions for renewal I believe. I am not sure what deposit you paid but i would default on the rent and utilities to the point of getting your deposit back and walk away. The TM30 is only the start of your problems. I'm an owner of rental condos in Pattaya but my Thai wife acts as the landlord and deals with all condo TM30's done initially and ongoing we have online accounts for each unit you landlord or agent is lazy it takes her 5 minutes to do the TM30 and for retirees or long-term visas it only has to be done once each year when new visa issued not every time you travel. The default might get his response.
If your condo building is nice speak with the management office, they sometimes have units for rent on behalf of owners so you may find another unit in same building. The landlord cannot do anything about default on rent and utilities as there is no agreement. With China now open he may want you out as rents are going up and he may have more Chinese customers paying higher rents for short term rentals.