ADSL problems persists

I have reported a faulty ADSL line several times already in the last few weeks. The last time was on Thursday last week ref 1524CRK110215. The ADSL line stops working around 7pm every night, whereeas it has been working fine up to that point. Sometime during the night or the next day it becomes operational again and at around 7pm it stops again. No feedback from Telkom other than to say a fault has been logged. Somehow it stops working at 7pm. We don't do anything to cause it to stop working or get it working again.