Can't convert smart shopper points to Avios

So disappointed and angry at the service from pick n pay. I have been battling since mid July to switch my points to Avios and they just keep saying this has been escalated I have laid complaints but have still not got anything back... I can't type in my account number on the pick n pay website or account and it keeps saying invalid ba account number please check your entries there is no place to check entries so how must I check I have even sent screens hots and asked them to do it on their side which they turned around and said my avios account doesn't exist but I have sent screen shots of my avios account and ba executive account... Are they even doing any work or what is happening I use avios at BP all the time there is nothing wrong with my account... I was even unable to enter the avios competition with pick n pay in July because of this. I have been dealing with Lorelle from customer service and the last time I heard from her was the 28 August when she said she would escalate my complaint again... Surely u need to fix your applications if I am unable to put in an account number on my side but customer service says they can edit an avios account number on their side. This is now over 2 months that I am trying to sort this out pick n pay!!! Ridiculous you people need to help your customers not ignore them