old mutual the worse service in sa

cancelled all my policies with them only to find out the very next month a inquiry being put by them on my credit score yet they took last debit off it has impacted me because i need to wait for 6 months for it to clear that means i can only purchase my house in 6 months time due to old mutual ive paid and never missed payment only to realize recently my money was not growing thats why i cancelled such big companies that can affect the livelihood of people that are struggling