Horrible customer service regarding extended service plans

Horrible aftermarket customer service! I started communicating with an agent at their call center on the 7th of January, she was incredibly helpful and friendly however once the decision was made (on the 18th of Jan) to go ahead to have an extended service plan put into place, it became horrific. I was sent from person to person and I continued following up. Today is 7 March 2022 and I am no further than I was on the 18th of January. The individuals who are responsible for actioning these extended service plans are nowhere to be found and cannot even answer an email within two months.