contactaban
-they were contacting
The word contactaban is the imperfect form of contactar in the third person plural.
See the full contactar conjugation

contactar

¿Cómo contactaban contigo, los cabecillas de Silk Road?
How did they contact you, the leaders of Silk Road?
Me contactaban docenas y después centenares de personas que pasaban por lo mismo que yo, o sea, que bregaban por hacer lo justo.
People put me in touch with dozens and later hundreds of people who were going through the same decision that I had gone through regarding what to do and what was right.
Todo estaba muy bien organizado, nos daban información útil por escrito y contactaban con nosotros con regularidad.
Everything was very well organized, they provided useful written information and contacted us regularly.
En algunos casos las oficinas del país y las oficinas regionales apenas se contactaban, por lo que no disponían de orientación y apoyo suficientes, para aprender a abordar una serie de cuestiones relativas a los programas.
In some cases, there was little contact between the regional and country offices, leading to limited support or guidance on how to handle a range of programme issues.
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