RCS Fails To Assist Me In Closing My Account

I have an account with Galaxy&Co. who has apparently closed all of their retail stores. I settled my full balance and wish to close my account completely. In light thereof that Galaxy&Co. have closed shop and that I don't know who to contact to close my account, I sent an e-mail to RCS Customer Care for assistance. (My Galaxy&Co. card is RCS related). I sent my first e-mail on the 16th of April 2019. On the 17th of April 2019 I was included in an e-mail in which the Closures Department was requested to assist me. After hearing nothing from the Closures Department, I sent an e-mail again on the 10th of May 2019 requesting assistance in closing my account. To date, I have still not received any assistance from RCS Closure Department. I wish to have my account closed with immediate effect.