FASTA Customer service

I settled my FASTA Loan earlier and a payment wS deducted from my bank account. I tried contacting FASTA on numerous occasions but my contact support ticket is automatically closed. The tekjephone numbers also switch automatically to number not available. Why do they offer the option to settle the loan early if they are not willing to consolidate the account. How do I stop the Debicheck from being deducted from my account at the end of the month? Will I be refunded with the early settlement amount?