Planet 42 / Poor Service

I've been a valued customer since Apr 2022, paid every month without missing a payment. On the 5th September I've informed Planet that I can no longer afford the instalment and therefore need to return the Rent to Own vehicle. Not receiving any response from them, daily follow up mails send with just no reply. On the 15th September I received their reply that they acknowledge my cancellation. And request some information from me on the vehicle. Until today after numerous of follow ups, I called them and was informed that they haven't received any email with the necessary information/documentation. I informed the lady that I will not accept any instalment at the end of October seeing that I've informed them already on the 5th Sep that I would like to cancel. I am very disappointed in the current service that I'm receiving from them. Because ever since we received the vehicle I did not had any problems with Planet, but now that I need to return the vehicle as I'm allowed to and as per my contract they just take their time to respond. Normally they were very quick on responding, but when you would like to cancel then they just ignore the fact that you need to get hold of them. Today is the 18th Sep, and I will not accept any instalment to be deducted at the end of October, because Planet was notified in advance on the 5th Sep about the Cancellation.