TAP Portugal review by DR EFRIN

I have 2 BUSINESS TOP EXEC tickets for Miami-Lisbon-Paris leaving April 7. Since March 12 I have sent 5 Emails + 1 letter and filed 4 complaints requesting a change of date because of the TRAVEL BAN. ALMOST ONE MONTH LATER, NOBODY has had the most elementary courtesy to answer any of my 10 messages! If this is how they treat those who buy their more expensive tickets, how do they treat those who buy the cheapest ones? And how can you TRUST AN AIRLINE THAT DOES NOT ANSWER TEN MESSAGES IN 1 MONTH???