After accident damage opposing insurance does not pay everything

Hello together, since I do not know at all how to behave, I describe here our problem … On May 13th (Friday 13th :/) my wife was hit (by the car standing at the traffic light) and pushed to the standing in front of her. Fortunately nothing happened to her except a small sling trauma, the police happened to be on site, looked at everything and the question of guilt was solved immediately. We had the car dragged to our car workshop u 3 days later we received the report from the lawyer … economic total damage, a sum of damages was fixed and submitted to the opposing insurance company for compensation … was paid on the last day of the period but was reduced by about 3% (approx. 250 euros), nobody knows why also the lawyer did not go closer on request of us … After about 10 days we then a) had the (b) a similar car was found in a car dealership about 150km away. Now this lawyer was required to compensate for the loss of use, i.e. in addition to the 10 days with a corresponding lump sum (according to a specified table) plus the expenses for the journey to the car dealership, registration costs etc. The deadline was June 25th about 1000 euros. You suspect it … so far no money has been received, lawyer was comforted with recall (which never occurred) also the current com munication with the lawyer runs very sluggish and passive -> we have to ask again and again and then was with the lawyer in between times, sometimes the colleague sick … In short we feel now quite alone