Appalling Service received from Experian

Appalling Service received from Experian, Lawyer submitted rescindment letter to Experian + proof of payment as well as paid up letter In May . no feedback was provided by Experian. I gave them 3 months to sort out bearing in mind Covid -lockdown got a lot of business not functioning 100%. i then followed up with them with no luck in September i forwarded the same email to them again still nothing. Today the 12 of December i received email from them stating that they did not receive my attachments??? how is that possible ??? I am so disgusted and disappointed with their service honestly playing with peoples time. I really hope and Pray that this time around they will be able to sort me out , this year still.