Unwilling to cancel my insurance or refund me

I have had a business vehicle insured for over a year with Miway & I have all my payments have been up to date without any claims. I traded in the vehicle on the 16th of August & forgot to call & cancel my insurance, then when a debit went off at the begining of September, I realised that it was still active & called on the 4th of September to cancel it. I was put through to Gloria Sikhakhane who informed me that I should email her the proof of trade in so that I could get my premiums back from the date of trade in. I received it from the dealership & fowarded it to Gloria on the 8th of September. I did not receive a response & sent an email on the 13th of September to find out what was going on. I received an email saying that it would be sorted out as soon as possible . I also got a call & Gloria informed me that everything was in order & that she would process my refund. A week later & nothing had happened, so on the 20th of September i sent an email inquiring about the refund & got no response. On the 26th of September I called & could not get in touch with Gloria so the agent placed a call back with her. The next day & no call back so I had to send another email to which I got a reply from info@miway & was fed some lies about how Gloria could not get a hold of me & that I need to call their call centre. I use my phone for business & I receive calls all day & my numbers was listed on all the emails that I sent so there is no way that they could not get a hold of me. I am not prepared to call that call centre again as it is very understaffed & it takes forever to get a hold of anyone. My policy is still active for a vehicle that I have traded in on the 16th of August & this is the worst experience that I have had just trying to get my policy cancelled & my premiums refunded. I can't imagine what would have happened if I had to claim. I am sick & tired of being given the run around. Gloria did tell me that I had a good profile & I informed her that I am receiving a new vehicle at the end of September, that might be the reason why she is not cancelling the policy & not refunding me. I would have insured my new vehicle with Miway but after being completely inconvenienced for around a month for a simply cancellation & refund, I will never want to deal with them again. The 1st of October is 2 days away & I am sure that they will debit my account again.