WORST POSSIBLE SERVICE

i am being harrassed by this company over email, sms and calls. I requested cancellation of my service which was confirmed ove the phone in Nov 2025, the service continued and debits went on. In January i escalated the issue and only got confirmation of my agreement being cancelled after huggling over the amount owed during the time i did not need service (dec, jan feb 2026). After receiving confirmation of cancellation over email. i am still bombarded by the collection department accusing me of having outstanding amount and as many as 5 calls in a day from various agents under the same company some of which upon failing to reach me on the phone will send me and email requesting me to settle outstanding amount, can anyone help with removing me completely from their database. my bank account is always in negative due to their consistent attempts to debit my account despite written confirmation of cancellation and confirmation that i dont owe them anything.