Very unprofessional and keep making invoice errors

I am writing this with great disappointment about this company.

My lease began on the 1st of March, and I had made all the required payments before receiving the keys. On the 3rd of April, I paid my first month’s rent (proof of payment has been provided multiple times). Despite this, I have continuously received emails, invoices, and even letters of demand claiming that I missed payments.

Initially, someone named Sibu gave me conflicting information about which months were outstanding. Even after I provided proof of payment, the matter was not resolved. I eventually sent an email including Sibu, Lillian, Sane, Farhaan, and Tyron. The only response came from Sibu, asking me for my unit number—information he should already have on record. He claimed their system had updated, while the others simply ignored the issue and failed to assist.

This company operates in a highly unprofessional manner and fails to keep accurate records. They continue to demand payments I have already made, and the constant back-and-forth accompanied by threats is unacceptable. Sibu repeatedly asks the same questions, forcing me to resend the same evidence over and over with no resolution.