FNB bad service to their valuable customer

A debit order with no name,no contacts went through my account today, it deducted money from my account,when I reach out to FNB (Thulisile and Jamiel )from Reversal department they could not assist me,they told me that they can’t reverse it as it’s blocked.I have spend 45 min on their chat boards they kept switching me to their agents, They told me I should call the Service provider,which service provide? I stated on their chat board that an unknown debit just went out through my account! I feel so helpless! I never encountered such humiliation with bank. Description of the debit order: NPSMARTBOLDCPRD0001GHP*** No company name nor contact numbers.