[Closed] Advice on how to get an Airlines customer service dept to respond pls?

We recently flew from Spain to the US to visit Mrs Spekkies daughter in NYC for 10 days. Had a fantastic time there but the flight over had some problems. (So did the flight back but we'll get to that in a minute). Now we need to deal with Customer Services at the airline but we're getting nowhere ....

Here are the basic details, any pointers would be welcome!

Flight was booked and paid for in the US by daughter.
Flight was booked with American Airlines but carried out by Iberia (as part of the One World Alliance code share agreement between them)
Flight was in two parts. Barcelona to Madrid then Madrid to NYC.
Flight from Barcelona was delayed by 30 minutes because of a problem with "the pushback tractor".
We managed to just about catch our connection to NYC, but our suitcases didn't . . .

At NYC we reported our missing bags to the Iberia lost luggage department, along with everyone else who was on delayed Barcelona connection flight, and eventually got a reference number.

I understand that bags can go missing, it happens, but what followed was three days of the most atrocious customer service I have ever had the misfortune to experience. Between myself, the daughter and her husband, we must have phoned Iberia customer services in NYC around 25 times.

The majority of the times we called the phone was answered in Spanish by someone who could not speak any English.
Occasionally the phone was answered by someone who could speak enough English to say "call back again and hopefully someone different will answer" Apparently there is no facility to transfer an incoming call to someone who could speak English.
We were "hung up on" without warning or explanation for at least half of the calls, regardless of the language the person at the other end was speaking.

The rest of the calls revolved around us being told:

Our bags have been lost forever.
Our bags never existed.
Our bags are with a local courier.
Our bags have been delivered already.....

Eventually, on the third day after arrival in NYC and after going through a relative of our son-in-laws who works at the airport (for KLM Maintenance) we were advised by Iberia to "buy enough clothes, toiletries etc to last 7 days" and that we would be compensated. We duly went out and did this, having now wasted the best part of three days trying to get any sense out of them. Our bags eventually arrived a few hours later that day and were dropped of to us without any paper work or even a single comment from the van driver.

We emailed Iberia customer services all of the documents they asked for, copies of tickets, passports, boarding passes, receipts etc etc, the day after our bags arrived and since then I have re-sent the email three times. The last time being this morning. They have not acknowledged receipt of the email, let alone answered it properly.

Mrs Spekkie is resorting to their FB page now to flame them . . . .