Reducing Account Limit for no reason

Once again I contact Woolworths in disdain. My parents purchased clothing and food at Woolworths Westwood Durban only to discover that their Woolworths account limit has been reduced to under R3000 without their knowledge. My parents are over the age of 60, they pay their accounts on time. In fact I pay this account. We have purchased on numerous times online with this account. This account has not been in arrears of late and has been paid up to date. So please explain to me why such customer service has been given to us. It is firstly embarrassing for long standing customers to face such service. This is not in line with customer centricity nor is it in line with any kind of customer value proposition that Woolworths might claim to hold true to. I am appealing to someone from Woolworths to contact me with regards to this matter. My parents do not deserve such service. I would like this matter resolved asap.